MESON Chess Problem Database
Problem Display
PID: 18687 (8/3R4/2nbn1N1/3k2P1/4p2R/1PBN1p2/1K3P2/3Q4 w - - 0 1)
Mansfield, Comins
San Francisco Chronicle, 1957
#2
10 + 6
| 3550 | Complete Mansfield/II | 1997 |
| 5454 | Near Snap | 2011 |
SOLUTION
- SOUND
- Sets
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sxg5
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...Sb4
- Tries
- 1.Ka1?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Kb1?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Kc1?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Bb4?
- threat
- 2.Sdf4#
- 2.Rxd6#
- 1...Kd4
- 2.Sc1#
- 2.Se1#
- 2.Sdf4#
- 2.Sc5#
- 2.Sde5#
- 2.Rxd6#
- 1...exd3
- 2.Rxd6#
- 2.Qxf3#
- 1...Sa5
- 2.Rxd6#
- 1...Se5
- 2.Rxd6#
- 1...Sa7
- 2.Rxd6#
- 1...Se7
- 2.Rxd6#
- 1...Sb8
- 2.Rxd6#
- 1...Scd8
- 2.Rxd6#
- 1...Sf4
- 2.Sdxf4#
- 2.Rxd6#
- 1...Sc5
- 2.Sdf4#
- 1...Scd4
- 2.Se7#
- 2.Rxd6#
- 1...e3
- 2.Rxd6#
- 2.Qxf3#
- 1...Sxb4!
- threat
- 1.Rh1?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Rh2?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Rh3?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Rg4?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Rh5?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Rh6?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Rhh7?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Rh8?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Qxf3?
- threat
- 2.Qxe4#
- 1...Sxg5
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...exf3!
- threat
- 1.Qh1?
- 1...Sxg5
- 2.Sgf4#
- 1...Sb4
- 2.Se7#
- 1...Scd4
- 2.Se7#
- 1...Sa5
- 2.Se7#
- 1...Se5
- 2.Se7#
- 1...Sa7
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...Sb8
- 2.Se7#
- 1...Scd8
- 2.Se7#
- 1...Sed4
- 2.Sgf4#
- 1...Sf4
- 2.Sgxf4#
- 1...Sc5
- 2.Sdf4#
- 2.Sgf4#
- 1...Sc7
- 2.Sgf4#
- 1...Sg7
- 2.Sgf4#
- 1...Sed8
- 2.Sgf4#
- 1...Sf8
- 2.Sgf4#
- 1...e3
- 2.Qxf3#
- 1...exd3!
- 1...Sxg5
- 1.Ka1?
- Keys
- 1.Bd4!
- 1...Kxd4
- 2.Rxd6#
- 1...Scxd4
- 2.Se7#
- 1...Sexd4
- 2.Sgf4#
- 1...Sxg5
- 2.Sdf4#
- 1...exd3
- 2.Qxf3#
- 1...Sb4
- 2.Sxb4#
- 1...Sa5
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...Sa7
- 2.Sb4#
- 1...Se7
- 2.Sb4#
- 1...Sb8
- 2.Sb4#
- 1...Scd8
- 2.Sb4#
- 1...Sf4
- 2.Sdxf4#
- 1...Sc5
- 2.Sdf4#
- 1...Sc7
- 2.Sdf4#
- 1...Sg7
- 2.Sdf4#
- 1...Sed8
- 2.Sdf4#
- 1...Sf8
- 2.Sdf4#
- 1...e3
- 2.Qxf3#
- 1...Kxd4
- 1.Bd4!
This anticipates 138662(1966), 157948(1973)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 13
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- S(f);N_GUARD,XP(H)::S(I)
- P(b);OGATEB::QAB(A),XP(a)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- K(B);P-FLIGHT
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- K(B);S_FLIGHT
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- B(E);
- Threat
- DUALS(2)
- Vars
- S(d);::R1(J),XB(e)
- S(f);::QAR(A)+S(F),DCHECK
- Refutation
- S(d);XB(E)
- Try
- R(G);
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- R(G);
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- R(G);
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- R(G);
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- R(G);
- Vars
- S(f);N_GUARD,P_SPINS(f),XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- R(G);
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- R(G);
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- R(G);
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(b),XS(F)
- Try
- Q(A);P_PINP(b),XP(a)
- Threat
- QAB1(A),XP(b)
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(f);N_GUARD::S(I),XS(f)
- Refutation
- P(b);N_SPINP(b),XQ(A)
- Try
- Q(A);
- Vars
- S(f);N_GUARD,XP(H)::S(I)
- S(d);N_GUARD::S(I)
- S(d);N_GUARD::S(I),XS(d)
- S(f);N_GUARD::S(I)
- S(f);N_GUARD::S(I),XS(f)
- P(b);OGATEB,P_SPINP(a)::QAB(A),XP(a)
- Refutation
- P(b);P_SPINP(a),XS(F)
- Try
- Actual
- B(E);
- Vars
- K(c);P-FLIGHT,P_SPINP(b),XB(E)::R(J),XB(e)
- S(d);N_GUARD,SBLOCK,XB(E)::S(I)
- S(f);N_GUARD,SBLOCK,XB(E)::S(I)
- S(f);N_GUARD,XP(H)::S(F)
- P(b);OGATEB,XS(F)::QAB(A),XP(a)
- S(d);N_GUARD::S(F),XS(d)
- S(d);N_GUARD::S(F)
- S(f);N_GUARD::S(F),XS(f)
- S(f);N_GUARD::S(F)
- P(b);OGATEB::QAB(A),XP(a)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).