MESON Chess Problem Database
Problem Display
PID: 176256 (3nR3/3p2B1/1KB5/4q2r/1p1k4/2p1N1R1/4bN2/Q7 w - - 0 1)
Hoek, Willem
Schach-Echo, 1972
#2
8 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qf6
- 2.Re4#
- 1...Qxg7
- 2.Re4#
- 1...Rh1
- 2.Bxe5#
- 1...Rh2
- 2.Bxe5#
- 1...Rh3
- 2.Bxe5#
- 1...Rh4
- 2.Bxe5#
- 1...Rh6
- 2.Bxe5#
- 1...Rh7
- 2.Bxe5#
- 1...Rh8
- 2.Bxe5#
- 1...Bd1
- 2.Qxd1#
- 1...Bc4
- 2.Sc2#
- 1...dxc6
- 2.Rxd8#
- 1...Qf6
- Tries
- 1.Rxe5?
- threat
- 2.Re4#
- 2.Rd5#
- 2.Rf5#
- 2.Reg5#
- 2.Rxh5#
- 1...Sxc6
- 2.Re4#
- 2.Rd5#
- 1...Rh1
- 2.Re4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Rf5#
- 2.Reg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Rh2
- 2.Re4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Rf5#
- 2.Reg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Rh3
- 2.Re4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Rf5#
- 2.Reg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Rh4
- 2.Re4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Rf5#
- 2.Reg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Rf5
- 2.Re4#
- 2.Rd5#
- 2.Rxf5#
- 1...Rg5
- 2.Re4#
- 2.Rd5#
- 2.Rexg5#
- 1...Rh6
- 2.Re4#
- 2.Rd5#
- 1...Rh7
- 2.Re4#
- 2.Rd5#
- 1...Rh8
- 2.Re4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Rf5#
- 2.Reg5#
- 2.Rh5#
- 2.Re6#
- 2.Re7#
- 2.Re8#
- 1...Bf3
- 2.Re4#
- 1...Se6
- 2.Re4#
- 2.Rd5#
- 1...Sf7
- 2.Re4#
- 2.Rd5#
- 1...d5
- 2.Re4#
- 2.Rxd5#
- 2.Rf5#
- 2.Reg5#
- 2.Rxh5#
- 1...Rxe5!
- threat
- 1.Qb1?
- threat
- 2.Qe4#
- 1...Bf3
- 2.Qd3#
- 1...c2
- 2.Qa1#
- 2.Qb2#
- 1...Rh4
- 2.Bxe5#
- 1...Bd3
- 2.Qxd3#
- 1...d5!
- threat
- 1.Qd1+?
- 1...Bd3
- 2.Qxd3#
- 1...Bxd1!
- 1...Bd3
- 1.Qh1?
- threat
- 2.Qe4#
- 2.Qd5#
- 1...Qxg7
- 2.Re4#
- 2.Qe4#
- 1...Rxh1
- 2.Bxe5#
- 1...dxc6
- 2.Rxd8#
- 2.Qe4#
- 1...c2
- 2.Qa1#
- 1...Qf6
- 2.Re4#
- 2.Qe4#
- 1...Rh4
- 2.Bxe5#
- 2.Qd5#
- 1...Bd3
- 2.Qd5#
- 1...Bc4
- 2.Sc2#
- 2.Qe4#
- 1...d5
- 2.Qxd5#
- 1...Bf3!
- threat
- 1.Qa2?
- threat
- 2.Sc2#
- 2.Qd5#
- 1...Qxg7
- 2.Sc2#
- 2.Re4#
- 1...dxc6
- 2.Sc2#
- 2.Rxd8#
- 1...Bf3
- 2.Sc2#
- 1...c2
- 2.Sxc2#
- 2.Qa1#
- 2.Qb2#
- 1...Qf6
- 2.Sc2#
- 2.Re4#
- 1...Bd1
- 2.Qc4#
- 2.Qd5#
- 1...Bd3
- 2.Qd5#
- 1...Bc4
- 2.Sc2#
- 2.Qxc4#
- 1...d5
- 2.Sc2#
- 2.Qxd5#
- 1...b3!
- threat
- 1.Qa5?
- threat
- 2.Qc5#
- 2.Qd5#
- 1...Qxg7
- 2.Re4#
- 1...dxc6
- 2.Rxd8#
- 2.Qc5#
- 1...Bf3
- 2.Qc5#
- 1...c2
- 2.Qa1#
- 2.Qc5#
- 1...Qf6
- 2.Re4#
- 1...Bc4
- 2.Sc2#
- 2.Qc5#
- 1...Se6
- 2.Qd5#
- 1...Sb7
- 2.Qd5#
- 1...d5
- 2.Qc5#
- 2.Qxd5#
- 1...d6
- 2.Qd5#
- 1...Bb5!
- threat
- 1.Rxe5?
- Keys
- 1.Qa7!
- threat
- 2.Qxd7#
- 1...Qxg7
- 2.Re4#
- 1...dxc6
- 2.Rxd8#
- 2.Qd7#
- 1...Bf3
- 2.Ka6#
- 1...c2
- 2.Qa1#
- 1...Qf6
- 2.Re4#
- 1...Rh6
- 2.Bxe5#
- 1...Bc4
- 2.Sc2#
- 1...Bg4
- 2.Ka6#
- 1...Sb7
- 2.Kxb7#
- 1...Sf7
- 2.Kb7#
- 1...d5
- 2.Ka5#
- 1...d6
- 2.Kc7#
- threat
- 1.Qa7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 8
- Sets
- Q(e);OGATE,P_PINB(F)::R1(H)
- Q(e);N_SPINQ(e),OGATE,XB(G)::R1(H)
- R(f);N_GUARD::B(G),XQ(e)
- R(f);N_GUARD,P_PINB(F)::B(G),XQ(e)
- B(a);N_GUARD::QAR(A),XB(a)
- B(a);SBLOCK::S(C)
- P(g);OGATEB,XB(F)::R(H),XS(h)
- Tries
- Try
- R(H);XQ(e)
- Threat
- DUALS(5)
- Vars
- B(a);::B(G)+R(H),DCHECK
- Refutation
- R(f);P_SPINR(f),XR(H)
- Try
- Q(A);N_PINP(b)
- Threat
- QAR1(A)
- Vars
- B(a);N_GUARD::QAR1(A)
- R(f);N_GUARD::B(G),XQ(e)
- B(a);N_GUARD::QAR1(A),XB(a)
- Refutation
- P(g);
- Try
- Q(A);CHECK,N_PINP(b)
- Vars
- B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
- Refutation
- B(a);XQ(A)
- Try
- Q(A);N_PINP(b)
- Threat
- DUALS(2)
- Vars
- R(f);N_GUARD,XQ(A)::B(G),XQ(e)
- P(b);OGATEB::QAB(A)
- B(a);::QAR1(A)
- P(g);::QAR1(A),XP(g)
- Refutation
- B(a);
- Try
- Q(A);N_PINP(b)
- Threat
- DUALS(2)
- Vars
- B(a);::S(C)
- B(a);::QAR1(A)
- Refutation
- P(c);
- Try
- Q(A);N_PINP(b)
- Threat
- DUALS(2)
- Vars
- Q(e);N_SPINQ(e),OGATE,XB(G)::R1(H)
- B(a);::QAB1(A)
- Q(e);OGATE,P_PINB(F)::R1(H)
- S(h);::QAR1(A)
- P(g);::QAR1(A)
- Refutation
- B(a);
- Try
- Actual
- Q(A);N_PINP(b)
- Threat
- QAR(A),XP(g)
- Vars
- Q(e);N_SPINQ(e),OGATE,XB(G)::R1(H)
- B(a);::QAB(A)+K(E)
- P(b);OGATEB::QAB(A)
- Q(e);OGATE,P_PINB(F)::R1(H)
- R(f);N_GUARD,P_PINB(F)::B(G),XQ(e)
- B(a);SBLOCK::S(C)
- S(h);::QAB(A)+K(E),XS(h)
- S(h);::QAB(A)+K(E)
- P(g);::QAB(A)+K(E)
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).