MESON Chess Problem Database
Problem Display
PID: 162637 (8/7b/2p1Q2P/2P2R1P/3p2kr/3p1R1N/K2n3P/4b3 w - - 0 1)
Gibbins, Norman Martin
The Observer, 1924
(First published on Sun Oct 5 1924)
#2
9 + 8
| 15239 | Valois Notebooks | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Rxh3
- 2.R3f4#
- 1...Rxh5
- 2.R5f4#
- 1...Bf2
- 2.Sxf2#
- 1...Bg3
- 2.Rxg3#
- 1...Bxf5
- 2.Qxf5#
- 1...Bg6
- 2.Qxg6#
- 1...Bg8
- 2.Qxg8#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Sxf3
- 2.Rg5#
- 1...Sc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Rxh3
- Tries
- 1.Ka1?
- 1...Rxh3
- 2.R3f4#
- 1...Rxh5
- 2.R5f4#
- 1...Bxf5
- 2.Qxf5#
- 1...Sxf3
- 2.Rg5#
- 1...Bg3
- 2.Rxg3#
- 1...Bf2
- 2.Sxf2#
- 1...Bg6
- 2.Qxg6#
- 1...Bg8
- 2.Qxg8#
- 2.Qg6#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb3+!
- 1...Rxh3
- 1.Kb2?
- 1...Rxh3
- 2.R3f4#
- 1...Rxh5
- 2.R5f4#
- 1...Bxf5
- 2.Qxf5#
- 1...Sxf3
- 2.Rg5#
- 1...Bg3
- 2.Rxg3#
- 1...Bf2
- 2.Sxf2#
- 1...Bg6
- 2.Qxg6#
- 1...Bg8
- 2.Qxg8#
- 2.Qg6#
- 1...Sb1
- 2.Qe4#
- 1...Sf1
- 2.Qe4#
- 1...Sb3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sc4+!
- 1...Rxh3
- 1.Sg1?
- threat
- 2.R3f4#
- 1...Bxf5
- 2.Qxf5#
- 1...Sxf3
- 2.Qe4#
- 1...Bg3
- 2.Rxg3#
- 1...Rxh2!
- threat
- 1.Rd5+?
- 1...Bf5
- 2.Qxf5#
- 1...Kxf3!
- 1...Bf5
- 1.Re5+?
- 1...Bf5
- 2.Qxf5#
- 1...Kxf3!
- 1...Bf5
- 1.Rf6+?
- 1...Bf5
- 2.Qxf5#
- 1...Kxh5!
- 1...Bf5
- 1.Rf7+?
- 1...Bf5
- 2.Qxf5#
- 1...Kxh5!
- 1...Bf5
- 1.Rf8+?
- 1...Bf5
- 2.Qxf5#
- 1...Kxh5!
- 1...Bf5
- 1.Qd5?
- threat
- 2.R5f4#
- 2.Rg5#
- 1...Rxh3
- 2.R3f4#
- 2.R5f4#
- 1...Rxh5
- 2.R5f4#
- 1...Bxf5
- 2.Qxf5#
- 1...Sxf3
- 2.Qxf3#
- 1...Bg3
- 2.Rxg3#
- 1...Se4
- 2.R5f4#
- 2.Qxe4#
- 1...cxd5!
- threat
- 1.Qf7?
- threat
- 2.R5f4#
- 2.Rg5#
- 1...Rxh3
- 2.R3f4#
- 1...Rxh5
- 2.R5f4#
- 2.Qxh5#
- 1...Bxf5
- 2.Qxf5#
- 1...Bg3
- 2.Rxg3#
- 1...Bg6
- 2.Rg5#
- 2.Qxg6#
- 1...Se4
- 2.R5f4#
- 1...Sxf3!
- threat
- 1.Qg8+?
- 1...Bg6
- 2.Qxg6#
- 1...Bxg8+!
- 1...Bg6
- 1.Ka1?
- Keys
- 1.Rf2!
- threat
- 2.Rg5#
- 1...Kxh3
- 2.R5f3#
- 1...Rxh3
- 2.R2f4#
- 1...Rxh5
- 2.R5f4#
- 1...Bxf2
- 2.Sxf2#
- 1...Bxf5
- 2.Qxf5#
- threat
- 1.Rf2!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- R(f);SBLOCK,XS(D)::R1(C)
- R(f);SBLOCK,XP(G)::QAB(H)+R(F),DCHECK
- B(a);N_GUARD::S(D),XB(a)
- B(a);N_GUARD::R1(C),XB(a)
- B(h);OGATE,P_SPINB(h),XR(F)::QAB1(H),XB(h)
- B(h);N_GUARD::QAR2(H),XB(h)
- B(h);N_GUARD,P_PINQ(H)::QAR(H),XB(h)
- S(b);N_GUARD::QAR2(H)
- S(b);SBLOCK,XR(C)::QAB(H)+R(F),DCHECK
- S(b);N_GUARD::QAR2(H),XS(b)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(f);SBLOCK,XS(D)::R1(C)
- R(f);SBLOCK,XP(G)::QAB(H)+R(F),DCHECK
- B(h);OGATE,P_SPINB(h),XR(F)::QAB1(H),XB(h)
- S(b);SBLOCK,XR(C)::QAB(H)+R(F),DCHECK
- B(a);N_GUARD::R1(C),XB(a)
- B(a);N_GUARD::S(D),XB(a)
- B(h);N_GUARD::QAR2(H),XB(h)
- S(b);N_GUARD::QAR2(H)
- S(b);N_GUARD::QAR2(H),XS(b)
- Refutation
- S(b);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- R(f);SBLOCK,XS(D)::R1(C)
- R(f);SBLOCK,XP(G)::QAB(H)+R(F),DCHECK
- B(h);OGATE,P_SPINB(h),XR(F)::QAB1(H),XB(h)
- S(b);SBLOCK,XR(C)::QAB(H)+R(F),DCHECK
- B(a);N_GUARD::R1(C),XB(a)
- B(a);N_GUARD::S(D),XB(a)
- B(h);N_GUARD::QAR2(H),XB(h)
- S(b);N_GUARD::QAR2(H)
- S(b);N_GUARD::QAR2(H),XS(b)
- Refutation
- S(b);CHECK
- Try
- S(D);
- Threat
- R1(C)
- Vars
- B(h);OGATE,P_SPINB(h),XR(F)::QAB1(H),XB(h)
- S(b);N_GUARD,XR(C)::QAR2(H)
- B(a);N_GUARD::R1(C),XB(a)
- Refutation
- R(f);XP(B)
- Try
- R(F);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAB1(H),XB(h)
- Refutation
- K(e);S_FLIGHT,XR(C)
- Try
- R(F);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAB1(H),XB(h)
- Refutation
- K(e);S_FLIGHT,XR(C)
- Try
- R(F);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAB1(H),XB(h)
- Refutation
- K(e);S_FLIGHT,XP(G)
- Try
- R(F);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAB1(H),XB(h)
- Refutation
- K(e);S_FLIGHT,XP(G)
- Try
- R(F);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAB1(H),XB(h)
- Refutation
- K(e);S_FLIGHT,XP(G)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- R(f);XP(G)::R1(F)
- B(h);OGATE,XR(F)::QAB1(H),XB(h)
- S(b);OGATE,XR(C)::QAB1(H),XS(b)
- B(a);N_GUARD::R1(C),XB(a)
- Refutation
- P(g);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- R(f);SBLOCK,XS(D)::R1(C)
- B(h);OGATE,XR(F)::QAB1(H),XB(h)
- B(a);N_GUARD::R1(C),XB(a)
- S(b);::R1(F)
- Refutation
- S(b);XR(C)
- Try
- Q(H);CHECK
- Vars
- B(h);N_GUARD,P_SPINB(h)::QAR2(H),XB(h)
- Refutation
- B(h);CHECK,XQ(H)
- Try
- Actual
- R(C);
- Threat
- QAB(H)+R(F),DCHECK
- Vars
- K(e);S_FLIGHT,XS(D)::QAB(H)+R(F),DCHECK
- R(f);SBLOCK,XS(D)::R1(C)
- R(f);SBLOCK,XP(G)::QAB(H)+R(F),DCHECK
- B(a);XR(C)::S(D),XB(a)
- B(h);OGATE,P_SPINB(h),XR(F)::QAB1(H),XB(h)
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).