MESON Chess Problem Database
Problem Display
PID: 99152 (8/6p1/8/6p1/5bBk/4P3/5P1N/Q4K1R w - - 0 1)
Groeneveld, Cornelis
Magyar Sakkelet, 1983
#2
7 + 4
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...g6
- 2.Qh8#
- 1...g6
- Tries
- 1.Bf5?
- threat
- 2.Sf3#
- 1...Bxh2
- 2.Rxh2#
- 1...Kh5!
- threat
- 1.Be6?
- threat
- 2.Sf3#
- 1...Bxh2
- 2.Rxh2#
- 1...Kh5!
- threat
- 1.Bd7?
- threat
- 2.Sf3#
- 1...Bxh2
- 2.Rxh2#
- 1...Kh5!
- threat
- 1.Bc8?
- threat
- 2.Sf3#
- 1...Bxh2
- 2.Rxh2#
- 1...Kh5!
- threat
- 1.Rg1?
- threat
- 2.Sf3#
- 1...Bg3
- 2.fxg3#
- 1...Bxh2!
- threat
- 1.Qe5?
- 1...Bxh2
- 2.Qg3#
- 1...Bxe3
- 2.Qg3#
- 1...Bg3
- 2.Qxg3#
- 2.fxg3#
- 1...g6
- 2.Qh8#
- 1...Bxe5!
- 1...Bxh2
- 1.Qxg7?
- threat
- 2.Qh6#
- 2.Qh8#
- 2.Qh7#
- 1...Be5
- 2.Qh6#
- 2.Qh7#
- 1...Bxh2!
- threat
- 1.Qe1?
- 1...Bxh2
- 2.f3#
- 1...Bxe3
- 2.fxe3#
- 1...Bg3
- 2.fxg3#
- 1...Be5
- 2.f4#
- 1...Bd6
- 2.f4#
- 1...Bc7
- 2.f4#
- 1...Bb8
- 2.f4#
- 1...g6!
- 1...Bxh2
- 1.Qa4?
- 1...Bxh2
- 2.Rxh2#
- 1...Bxe3
- 2.Sf3#
- 1...Bg3
- 2.Sf3#
- 1...Be5
- 2.Sf3#
- 1...Bd6
- 2.Sf3#
- 1...Bc7
- 2.Sf3#
- 1...Bb8
- 2.Sf3#
- 1...g6!
- 1...Bxh2
- 1.exf4?
- 1...g6
- 2.Qh8#
- 1...gxf4!
- 1...g6
- 1.Bf5?
- Keys
- 1.Qd4!
- 1...Bxh2
- 2.Rxh2#
- 1...Bxe3
- 2.Sf3#
- 1...Bg3
- 2.Sf3#
- 1...Be5
- 2.Sf3#
- 1...Bd6
- 2.Sf3#
- 1...Bc7
- 2.Sf3#
- 1...Bb8
- 2.Sf3#
- 1...g6
- 2.Qh8#
- 1...Bxh2
- 1.Qd4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
- Sets
- P(d);OGATE::QAR(A)
- Tries
- Try
- B(G);
- Threat
- R(C)+S(E),DCHECK
- Vars
- B(a);OGATE,P_SPINB(a),XS(E)::R(C),XB(a)
- Refutation
- K(b);P-FLIGHT
- Try
- B(G);
- Threat
- R(C)+S(E),DCHECK
- Vars
- B(a);OGATE,P_SPINB(a),XS(E)::R(C),XB(a)
- Refutation
- K(b);P-FLIGHT
- Try
- B(G);
- Threat
- R(C)+S(E),DCHECK
- Vars
- B(a);OGATE,P_SPINB(a),XS(E)::R(C),XB(a)
- Refutation
- K(b);P-FLIGHT
- Try
- B(G);
- Threat
- R(C)+S(E),DCHECK
- Vars
- B(a);OGATE,P_SPINB(a),XS(E)::R(C),XB(a)
- Refutation
- K(b);P-FLIGHT
- Try
- R(C);
- Threat
- S(E)
- Vars
- B(a);OGATE::P(D),XB(a)
- Refutation
- B(a);XS(E)
- Try
- Q(A);
- Vars
- B(a);OGATE,P_SPINB(a),XS(E)::QAB1(A)
- B(a);OGATE,XP(F)::QAB1(A)
- P(d);OGATE::QAR(A)
- Refutation
- B(a);XQ(A)
- Try
- Q(A);XP(d)
- Threat
- DUALS(3)
- Refutation
- B(a);P_SPINB(a),XS(E)
- Try
- Q(A);
- Vars
- B(a);N_GUARD,P_SPINB(a),XS(E)::QAB(A)+P(D)
- B(a);OGATE,XP(F)::QAB(A)+P(D),XB(a)
- B(a);OGATE::P(D),XB(a)
- B(a);OGATE::QAB(A)+P(D)
- Refutation
- P(d);
- Try
- Q(A);
- Vars
- B(a);OGATE,P_SPINB(a),XS(E)::R(C),XB(a)
- B(a);XP(F)::R(C)+S(E),DCHECK
- B(a);::R(C)+S(E),DCHECK
- Refutation
- P(d);
- Try
- P(F);XB(a)
- Vars
- P(d);OGATE::QAR(A)
- Refutation
- P(c);XP(F)
- Try
- Actual
- Q(A);
- Vars
- B(a);OGATE,P_SPINB(a),XS(E)::R(C),XB(a)
- B(a);XP(F)::R(C)+S(E),DCHECK
- B(a);::R(C)+S(E),DCHECK
- P(d);OGATE::QAR(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).