MESON Chess Problem Database
Problem Display
PID: 175171 (4N3/5n2/1R1B4/2p1Pk1p/2Q1b1RP/1P4P1/2n2KN1/8 w - - 0 1)
Johnson, Henry Sparks
Boston Sunday Post, 1902
#2
11 + 6
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Bxg2
- 2.Sg7#
- 1...Bd3
- 2.Sg7#
- 1...Bf3
- 2.Sg7#
- 1...Bd5
- 2.Sg7#
- 1...Bc6
- 2.Sg7#
- 1...Bb7
- 2.Sg7#
- 1...Ba8
- 2.Sg7#
- 1...Sa1
- 2.Se3#
- 1...Se1
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb4
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sxe5
- 2.Rg5#
- 1...Sg5
- 2.Rxg5#
- 1...Sxd6
- 2.Rg5#
- 1...Sh6
- 2.Rg5#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 1...hxg4
- 2.Qxf7#
- 1...Bxg2
- Tries
- 1.Kg1?
- 1...Bxg2
- 2.Sg7#
- 1...Sxe5
- 2.Rg5#
- 1...Sxd6
- 2.Rg5#
- 1...hxg4
- 2.Qxf7#
- 1...Sg5
- 2.Rxg5#
- 1...Bd3
- 2.Sg7#
- 1...Bf3
- 2.Sg7#
- 1...Bd5
- 2.Sg7#
- 1...Bc6
- 2.Sg7#
- 1...Bb7
- 2.Sg7#
- 1...Ba8
- 2.Sg7#
- 1...Sa1
- 2.Se3#
- 1...Se1
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb4
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh6
- 2.Rg5#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 1...Kxg4!
- 1...Bxg2
- 1.Sc7?
- threat
- 2.Qe6#
- 2.Qxe4#
- 1...Bxg2
- 2.Qe6#
- 2.Qf4#
- 1...Sxe5
- 2.Qe6#
- 1...Sxd6
- 2.Rg5#
- 2.Qe6#
- 1...hxg4
- 2.Qe6#
- 2.Qxf7#
- 1...Sg5
- 2.Rxg5#
- 1...Bd3
- 2.Qe6#
- 2.Qf4#
- 1...Bf3
- 2.Qe6#
- 2.Qf4#
- 1...Bd5
- 2.Qf4#
- 1...Bc6
- 2.Qe6#
- 2.Qf4#
- 1...Bb7
- 2.Qe6#
- 2.Qf4#
- 1...Ba8
- 2.Qe6#
- 2.Qf4#
- 1...Sd4
- 2.Se3#
- 1...Sd8
- 2.Rg5#
- 2.Qxe4#
- 1...Kxg4!
- threat
- 1.Bc7?
- threat
- 2.Rf4#
- 2.Qe6#
- 2.Qxe4#
- 1...Bxg2
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...hxg4
- 2.Sg7#
- 2.Rf6#
- 2.Qe6#
- 2.Qxf7#
- 1...Sd6
- 2.Rg5#
- 1...Bd3
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...Bf3
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...Bd5
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qf4#
- 1...Bc6
- 2.Sg7#
- 1...Bb7
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...Ba8
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...Sd4
- 2.Se3#
- 2.Rf4#
- 1...Sg5
- 2.Rf4#
- 2.Rxg5#
- 1...Sd8
- 2.Rf4#
- 2.Rg5#
- 2.Qxe4#
- 1...Kxg4!
- threat
- 1.Bb8?
- threat
- 2.Rf4#
- 2.Qe6#
- 2.Qxe4#
- 1...Bxg2
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...hxg4
- 2.Sg7#
- 2.Rf6#
- 2.Qe6#
- 2.Qxf7#
- 1...Sd6
- 2.Rg5#
- 1...Bc6
- 2.Sg7#
- 1...Bd3
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...Bf3
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...Bd5
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qf4#
- 1...Bb7
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...Ba8
- 2.Sg7#
- 2.Rf4#
- 2.Rf6#
- 2.Qe6#
- 2.Qf4#
- 1...Sd4
- 2.Se3#
- 2.Rf4#
- 1...Sg5
- 2.Rf4#
- 2.Rxg5#
- 1...Sd8
- 2.Rf4#
- 2.Rg5#
- 2.Qxe4#
- 1...Kxg4!
- threat
- 1.Rg6?
- threat
- 2.Qe6#
- 2.Qxf7#
- 1...Bxg2
- 2.Rf6#
- 1...Sxe5
- 2.Rg5#
- 2.Qe6#
- 1...Sxd6
- 2.Rg5#
- 2.Qe6#
- 1...Sg5
- 2.Rxg5#
- 1...Bc6
- 2.Rf6#
- 1...Bd3
- 2.Rf6#
- 2.Qxd3#
- 1...Bf3
- 2.Rf6#
- 1...Bd5
- 2.Rf6#
- 1...Bb7
- 2.Rf6#
- 1...Ba8
- 2.Rf6#
- 1...Sd4
- 2.Qxf7#
- 1...Sh6
- 2.Rg5#
- 2.Qe6#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 2.Qe6#
- 1...Kxg6!
- threat
- 1.Rb5?
- 1...Bxg2
- 2.Sg7#
- 1...Sxe5
- 2.Rg5#
- 1...Sxd6
- 2.Rg5#
- 1...hxg4
- 2.Qxf7#
- 1...Sg5
- 2.Rxg5#
- 1...Bc6
- 2.Sg7#
- 1...Bd3
- 2.Sg7#
- 1...Bf3
- 2.Sg7#
- 1...Bd5
- 2.Sg7#
- 1...Bb7
- 2.Sg7#
- 1...Ba8
- 2.Sg7#
- 1...Sa1
- 2.Se3#
- 1...Se1
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb4
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh6
- 2.Rg5#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 1...Kxg4!
- 1...Bxg2
- 1.Ra6?
- 1...Bxg2
- 2.Sg7#
- 1...Sxe5
- 2.Rg5#
- 1...Sxd6
- 2.Rg5#
- 1...hxg4
- 2.Qxf7#
- 1...Sg5
- 2.Rxg5#
- 1...Bc6
- 2.Sg7#
- 1...Bd3
- 2.Sg7#
- 1...Bf3
- 2.Sg7#
- 1...Bd5
- 2.Sg7#
- 1...Bb7
- 2.Sg7#
- 1...Ba8
- 2.Sg7#
- 1...Sa1
- 2.Se3#
- 1...Se1
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb4
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh6
- 2.Rg5#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 1...Kxg4!
- 1...Bxg2
- 1.Rc6?
- 1...Bxg2
- 2.Sg7#
- 1...Bxc6
- 2.Sg7#
- 1...Sxe5
- 2.Rg5#
- 1...Sxd6
- 2.Rg5#
- 1...hxg4
- 2.Qxf7#
- 1...Sg5
- 2.Rxg5#
- 1...Bd3
- 2.Sg7#
- 1...Bf3
- 2.Sg7#
- 1...Bd5
- 2.Sg7#
- 1...Sa1
- 2.Se3#
- 1...Se1
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb4
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh6
- 2.Rg5#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 1...Kxg4!
- 1...Bxg2
- 1.Rb7?
- 1...Bxg2
- 2.Sg7#
- 2.Rxf7#
- 1...Bxb7
- 2.Sg7#
- 1...Sxe5
- 2.Rg5#
- 1...Sxd6
- 2.Rg5#
- 1...hxg4
- 2.Qxf7#
- 1...Sg5
- 2.Rxg5#
- 1...Bc6
- 2.Sg7#
- 2.Rxf7#
- 1...Bd3
- 2.Sg7#
- 2.Rxf7#
- 1...Bf3
- 2.Sg7#
- 2.Rxf7#
- 1...Bd5
- 2.Sg7#
- 1...Sa1
- 2.Se3#
- 1...Se1
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb4
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh6
- 2.Rg5#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 1...Kxg4!
- 1...Bxg2
- 1.Rb8?
- 1...Bxg2
- 2.Sg7#
- 1...Sxe5
- 2.Rg5#
- 1...Sxd6
- 2.Rg5#
- 1...hxg4
- 2.Qxf7#
- 1...Sg5
- 2.Rxg5#
- 1...Bc6
- 2.Sg7#
- 1...Bd3
- 2.Sg7#
- 1...Bf3
- 2.Sg7#
- 1...Bd5
- 2.Sg7#
- 1...Bb7
- 2.Sg7#
- 1...Ba8
- 2.Sg7#
- 1...Sa1
- 2.Se3#
- 1...Se1
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sb4
- 2.Se3#
- 1...Sd4
- 2.Se3#
- 1...Sh6
- 2.Rg5#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 1...Kxg4!
- 1...Bxg2
- 1.b4?
- 1...Bxg2
- 2.Sg7#
- 1...Sxb4
- 2.Se3#
- 1...Sxe5
- 2.Rg5#
- 1...Sxd6
- 2.Rg5#
- 1...cxb4
- 2.Qc8#
- 1...hxg4
- 2.Qxf7#
- 1...Sg5
- 2.Rxg5#
- 1...Bc6
- 2.Sg7#
- 1...Bd3
- 2.Sg7#
- 1...Bf3
- 2.Sg7#
- 1...Bd5
- 2.Sg7#
- 1...Bb7
- 2.Sg7#
- 1...Ba8
- 2.Sg7#
- 1...Sa1
- 2.Se3#
- 1...Se1
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sd4
- 2.Se3#
- 1...Sh6
- 2.Rg5#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 1...Kxg4!
- 1...Bxg2
- 1.Kg1?
- Keys
- 1.Rb4!
- 1...Kxg4
- 2.Qe6#
- 1...Bxg2
- 2.Sg7#
- 2.Qxf7#
- 1...Sxb4
- 2.Se3#
- 1...Sxe5
- 2.Rg5#
- 1...Sxd6
- 2.Rg5#
- 1...cxb4
- 2.Qc8#
- 1...hxg4
- 2.Qxf7#
- 1...Sg5
- 2.Rxg5#
- 1...Bc6
- 2.Sg7#
- 2.Qxf7#
- 1...Bd3
- 2.Sg7#
- 2.Qxf7#
- 1...Bf3
- 2.Sg7#
- 2.Qxf7#
- 1...Bd5
- 2.Sg7#
- 1...Bb7
- 2.Sg7#
- 2.Qxf7#
- 1...Ba8
- 2.Sg7#
- 2.Qxf7#
- 1...Sa1
- 2.Se3#
- 1...Se1
- 2.Se3#
- 1...Sa3
- 2.Se3#
- 1...Se3
- 2.Sxe3#
- 1...Sd4
- 2.Se3#
- 1...Sh6
- 2.Rg5#
- 1...Sd8
- 2.Rg5#
- 1...Sh8
- 2.Rg5#
- 1...Kxg4
- 1.Rb4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- B(b);XS(B)::S(K)
- B(b);::S(K)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(f);N_GUARD,XP(H)::R1(F)
- S(f);N_GUARD::R1(F),XS(f)
- S(f);N_GUARD,XB(J)::R1(F)
- S(f);N_GUARD::R1(F)
- P(e);SBLOCK,XR(F)::QAR2(E),XS(f)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- B(b);XS(B)::S(K)
- S(f);N_GUARD,XP(H)::R1(F)
- S(f);N_GUARD,XB(J)::R1(F)
- P(e);SBLOCK,XR(F)::QAR2(E),XS(f)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);::S(K)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(f);N_GUARD::R1(F)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- S(K);
- Threat
- DUALS(2)
- Vars
- S(f);XP(H)::QAB1(E)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);OGATE::QAR1(E)
- S(a);N_GUARD::S(B)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- B(J);
- Threat
- DUALS(3)
- Vars
- S(f);N_GUARD::R1(F)
- B(b);::S(K)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- B(J);
- Threat
- DUALS(3)
- Vars
- S(f);N_GUARD::R1(F)
- B(b);::S(K)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- B(b);XS(B)::R1(F)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);::R1(F)
- S(a);::QAR2(E),XS(f)
- S(f);N_GUARD::R1(F)
- Refutation
- K(d);S_FLIGHT,XR(F)
- Try
- R(I);
- Vars
- B(b);XS(B)::S(K)
- S(f);N_GUARD,XP(H)::R1(F)
- S(f);N_GUARD,XB(J)::R1(F)
- P(e);SBLOCK,XR(F)::QAR2(E),XS(f)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);::S(K)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(f);N_GUARD::R1(F)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- R(I);
- Vars
- B(b);XS(B)::S(K)
- S(f);N_GUARD,XP(H)::R1(F)
- S(f);N_GUARD,XB(J)::R1(F)
- P(e);SBLOCK,XR(F)::QAR2(E),XS(f)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);::S(K)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(f);N_GUARD::R1(F)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- R(I);
- Vars
- B(b);XS(B)::S(K)
- B(b);XR(I)::S(K)
- S(f);N_GUARD,XP(H)::R1(F)
- S(f);N_GUARD,XB(J)::R1(F)
- P(e);SBLOCK,XR(F)::QAR2(E),XS(f)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);::S(K)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(f);N_GUARD::R1(F)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- R(I);
- Vars
- B(b);XR(I)::S(K)
- S(f);N_GUARD,XP(H)::R1(F)
- S(f);N_GUARD,XB(J)::R1(F)
- P(e);SBLOCK,XR(F)::QAR2(E),XS(f)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);::S(K)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(f);N_GUARD::R1(F)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- R(I);
- Vars
- B(b);XS(B)::S(K)
- S(f);N_GUARD,XP(H)::R1(F)
- S(f);N_GUARD,XB(J)::R1(F)
- P(e);SBLOCK,XR(F)::QAR2(E),XS(f)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);::S(K)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(f);N_GUARD::R1(F)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- P(C);
- Vars
- B(b);XS(B)::S(K)
- S(a);N_GUARD,XP(C)::S(B)
- S(f);N_GUARD,XP(H)::R1(F)
- S(f);N_GUARD,XB(J)::R1(F)
- P(c);OGATE,XP(C)::QAB(E)
- P(e);SBLOCK,XR(F)::QAR2(E),XS(f)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);::S(K)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(f);N_GUARD::R1(F)
- Refutation
- K(d);P_SPINB(b),S_FLIGHT,XR(F)
- Try
- Actual
- R(I);
- Vars
- K(d);P_SPINB(b),S_FLIGHT,XR(F)::QAB(E)
- S(a);N_GUARD,XR(I)::S(B)
- S(f);N_GUARD,XP(H)::R1(F)
- S(f);N_GUARD,XB(J)::R1(F)
- P(c);OGATE,XR(I)::QAB(E)
- P(e);SBLOCK,XR(F)::QAR2(E),XS(f)
- S(f);N_GUARD::R1(F),XS(f)
- B(b);::S(K)
- S(a);N_GUARD::S(B)
- S(a);N_GUARD::S(B),XS(a)
- S(f);N_GUARD::R1(F)
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).