MESON Chess Problem Database
Problem Display
PID: 118768 (4brrb/8/3N4/2Q5/3B1k2/4R1N1/1R2B3/K7 w - - 0 1)
Stubbs, Charles Francis
Brooklyn Eagle, 1907
#2
8 + 5
| 5454 | Near Snap | 2009 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rf5
- 2.Qxf5#
- 1...Rf6
- 2.Qe5#
- 1...Rf7
- 2.Sh5#
- 1...Rxg3
- 2.Re4#
- 1...Rg4
- 2.Rf3#
- 1...Rg6
- 2.Sh5#
- 1...Rg7
- 2.Qe5#
- 1...Ba4
- 2.Sh5#
- 1...Bb5
- 2.Sh5#
- 1...Bh5
- 2.Sxh5#
- 1...Bc6
- 2.Sh5#
- 1...Bd7
- 2.Sh5#
- 1...Bf7
- 2.Qf5#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qf5#
- 1...Rf5
- Tries
- 1.Sf7?
- threat
- 2.Sh5#
- 2.Qf5#
- 1...Rxf7
- 2.Sh5#
- 1...Bxf7
- 2.Qf5#
- 1...Bxd4
- 2.Qxd4#
- 1...Rg5
- 2.Qxg5#
- 1...Bd7
- 2.Sh5#
- 1...Be5
- 2.Bxe5#
- 2.Qxe5#
- 1...Rxg3!
- threat
- 1.Bd1?
- threat
- 2.Rf2#
- 1...Rxg3
- 2.Re4#
- 1...Rf5
- 2.Qxf5#
- 1...Be5
- 2.Qxe5#
- 1...Bc6
- 2.Sh5#
- 1...Bh5
- 2.Sxh5#
- 1...Bxd4!
- threat
- 1.Bh5?
- threat
- 2.Se2#
- 2.Rf2#
- 2.Rf3#
- 1...Rxg3
- 2.Re4#
- 1...Bxd4
- 2.Rf3#
- 1...Rf5
- 2.Qxf5#
- 1...Be5
- 2.Qxe5#
- 1...Bc6
- 2.Se2#
- 1...Rg4
- 2.Se2#
- 2.Rf2#
- 1...Bb5
- 2.Rf2#
- 2.Rf3#
- 1...Bxh5!
- threat
- 1.Be5+?
- 1...Bxe5
- 2.Qxe5#
- 1...Kg5!
- 1...Bxe5
- 1.Bf6?
- threat
- 2.Rb4#
- 2.Qd4#
- 2.Qe5#
- 1...Rxf6
- 2.Rb4#
- 2.Qe5#
- 1...Bc6
- 2.Sh5#
- 2.Qe5#
- 1...Rg5
- 2.Bxg5#
- 2.Rb4#
- 2.Qd4#
- 2.Qxg5#
- 1...Bb5
- 2.Sh5#
- 2.Qd4#
- 2.Qe5#
- 1...Bg6
- 2.Bg5#
- 2.Qe5#
- 2.Qg5#
- 1...Bf7
- 2.Qd4#
- 2.Qe5#
- 1...Bxf6!
- threat
- 1.Bxh8?
- threat
- 2.Rb4#
- 2.Qe5#
- 1...Bc6
- 2.Sh5#
- 2.Qe5#
- 1...Rg5
- 2.Rb4#
- 2.Qd4#
- 1...Bb5
- 2.Sh5#
- 2.Qe5#
- 1...Bg6
- 2.Qe5#
- 1...Bf7
- 2.Qe5#
- 1...Rf5!
- threat
- 1.Rb1?
- threat
- 2.Rf1#
- 1...Rxg3
- 2.Re4#
- 1...Rf5
- 2.Qxf5#
- 1...Be5
- 2.Qxe5#
- 1...Bc6
- 2.Sh5#
- 1...Bh5
- 2.Sxh5#
- 1...Bxd4+!
- threat
- 1.Sf7?
- Keys
- 1.Rb5!
- 1...Bxd4+
- 2.Qxd4#
- 1...Rxg3
- 2.Re4#
- 1...Bxb5
- 2.Sh5#
- 1...Rf5
- 2.Qxf5#
- 1...Be5
- 2.Qxe5#
- 1...Bg6
- 2.Qg5#
- 1...Rf6
- 2.Qe5#
- 1...Rf7
- 2.Sh5#
- 1...Rg4
- 2.Rf3#
- 1...Rg5
- 2.Qxg5#
- 1...Rg6
- 2.Sh5#
- 1...Rg7
- 2.Qe5#
- 1...Bh5
- 2.Sxh5#
- 1...Bc6
- 2.Sh5#
- 1...Bd7
- 2.Sh5#
- 1...Bf7
- 2.Qf5#
- 1...Bf6
- 2.Qf5#
- 1...Bg7
- 2.Qg5#
- 1...Bxd4+
- 1.Rb5!
This anticipates 57293(1997)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- R(c);N_GUARD::QAR1(G),XR(c)
- R(c);S_CUTB(e)::QAB1(G)
- R(c);S_CUTB(b)::S(E)
- R(d);SBLOCK,XS(E)::R1(D)
- R(d);SBLOCK::R1(D)
- R(d);S_CUTB(b)::S(E)
- R(d);S_CUTB(e)::QAB1(G)
- B(b);N_GUARD::S(E)
- B(b);N_GUARD::S(E),XB(b)
- B(b);S_CUTR(c)::QAR1(G)
- B(e);N_GUARD::QAB1(G),XB(e)
- B(e);S_CUTR(c)::QAR1(G)
- Tries
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(c);XS(H)::S(E)
- B(b);XS(H)::QAR1(G)
- B(e);OGATE,P_PINR(B),XB(F)::QAR2(G),XB(e)
- R(d);N_GUARD::QAB1(G),XR(d)
- B(b);::S(E)
- Refutation
- R(d);XS(E)
- Try
- B(C);
- Threat
- R(B)
- Vars
- R(d);SBLOCK,XS(E)::R1(D)
- R(c);N_GUARD::QAR1(G),XR(c)
- B(e);N_GUARD::QAB1(G),XB(e)
- B(b);N_GUARD::S(E)
- B(b);N_GUARD::S(E),XB(b)
- Refutation
- B(e);P_PINR(B),XB(F)
- Try
- B(C);
- Threat
- DUALS(3)
- Vars
- R(d);SBLOCK,XS(E)::R1(D)
- B(e);P_PINR(B),XB(F)::R1(D)
- R(c);N_GUARD::QAR1(G),XR(c)
- B(e);N_GUARD::QAB1(G),XB(e)
- B(b);::S(E)
- Refutation
- B(b);XB(C)
- Try
- B(F);CHECK
- Vars
- B(e);OGATE,P_PINR(B),XB(F)::QAB1(G),XB(e)
- Refutation
- K(a);S_FLIGHT
- Try
- B(F);
- Threat
- DUALS(3)
- Refutation
- B(e);P_PINR(B),XB(F)
- Try
- B(F);XB(e)
- Threat
- DUALS(2)
- Vars
- B(b);::QAB1(G)
- Refutation
- R(c);
- Try
- R(B);P_SPINB(F)
- Threat
- R(B)
- Vars
- R(d);SBLOCK,XS(E)::R1(D)
- R(c);N_GUARD::QAR1(G),XR(c)
- B(e);N_GUARD::QAB1(G),XB(e)
- B(b);N_GUARD::S(E)
- B(b);N_GUARD::S(E),XB(b)
- Refutation
- B(e);CHECK,XB(F)
- Try
- Actual
- R(B);P_SPINB(F)
- Vars
- B(e);CHECK,OGATE,XB(F)::QAR2(G),XB(e)
- R(d);SBLOCK,XS(E)::R1(D)
- B(b);N_GUARD,XR(B)::S(E)
- R(c);N_GUARD::QAR1(G),XR(c)
- B(e);N_GUARD::QAB1(G),XB(e)
- B(b);S_CUTR(d)::QAB1(G)
- R(c);N_PINB(F),S_CUTB(e)::QAB1(G)
- R(c);S_CUTB(b)::S(E)
- R(d);SBLOCK::R1(D)
- R(d);N_GUARD::QAB1(G),XR(d)
- R(d);S_CUTB(b)::S(E)
- R(d);N_PINB(F),S_CUTB(e)::QAB1(G)
- B(b);N_GUARD::S(E),XB(b)
- B(b);N_GUARD::S(E)
- B(b);S_CUTR(c)::QAR1(G)
- B(e);S_CUTR(c)::QAR1(G)
- B(e);S_CUTR(d)::QAB1(G)
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).