MESON Chess Problem Database
Problem Display
PID: 275987 (1n4Qb/rpN1B3/r2RK3/4PB2/N1k5/R1P4b/q1P1p3/8 w - - 0 1)
Degener, Udo
Springaren, 1993
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qb3
- 2.cxb3#
- 1...Rxa4
- 2.Rd4#
- 1...Ra5
- 2.Rd4#
- 1...Rxd6+
- 2.Kxd6#
- 1...Bf1
- 2.Bd3#
- 2.Qg4#
- 1...Bg2
- 2.Bd3#
- 1...Bg4
- 2.Qxg4#
- 1...Bxf5+
- 2.Kxf5#
- 1...Bxe5
- 2.Kxe5#
- 1...Bf6
- 2.Kxf6#
- 1...Sc6
- 2.Kd7#
- 1...Sd7
- 2.Kxd7#
- 1...b6
- 2.Rd4#
- 1...Qb3
- Tries
- 1.Kf7?
- threat
- 2.Kg6#
- 2.Ke8#
- 2.Kf8#
- 2.Bd3#
- 2.Rd4#
- 1...Qxc2
- 2.Kg6#
- 2.Ke8#
- 2.Kf8#
- 2.Rd4#
- 1...Rxa4
- 2.Rd4#
- 1...Bxf5
- 2.Rd4#
- 1...Bxe5
- 2.Kg6#
- 2.Ke8#
- 2.Kf8#
- 2.Bd3#
- 1...e1S
- 2.Kg6#
- 2.Ke8#
- 2.Kf8#
- 2.Rd4#
- 1...Ra5
- 2.Bd3#
- 2.Rd4#
- 1...Bg2
- 2.Bd3#
- 2.Rd4#
- 1...Bg7
- 2.Kg6#
- 2.Kxg7#
- 2.Ke8#
- 2.Bd3#
- 2.Rd4#
- 1...Sc6
- 2.Kg6#
- 2.Ke8#
- 2.Kf8#
- 2.Bd3#
- 1...Sd7
- 2.Kg6#
- 2.Ke8#
- 2.Bd3#
- 2.Rd4#
- 1...Rxd6!
- threat
- 1.Bxh3?
- threat
- 2.Kf5#
- 2.Qg4#
- 1...Rxd6+
- 2.Kxd6#
- 1...Rxa4
- 2.Rd4#
- 1...Bxe5
- 2.Kxe5#
- 2.Kf5#
- 1...e1Q
- 2.Kf5#
- 1...e1R
- 2.Kf5#
- 1...Ra5
- 2.Rd4#
- 2.Qg4#
- 1...Bg7
- 2.Kf5#
- 1...Sc6
- 2.Kf5#
- 2.Kd7#
- 1...Qxc2!
- threat
- 1.Bg4?
- threat
- 2.Kf5#
- 1...Rxd6+
- 2.Kxd6#
- 1...Bxg4+
- 2.Qxg4#
- 1...Rxa4
- 2.Rd4#
- 1...Ra5
- 2.Rd4#
- 1...Bg2
- 2.Bxe2#
- 1...Qxc2!
- threat
- 1.Bh4?
- threat
- 2.Ke7#
- 1...Rxd6+
- 2.Kxd6#
- 1...Bxf5+
- 2.Kxf5#
- 1...Ra5
- 2.Rd4#
- 1...Bg2
- 2.Bd3#
- 1...Bf6
- 2.Kxf6#
- 1...Sc6
- 2.Kd7#
- 1...Rxa4!
- threat
- 1.Bg5?
- threat
- 2.Ke7#
- 1...Rxd6+
- 2.Kxd6#
- 1...Bxf5+
- 2.Kxf5#
- 1...Ra5
- 2.Rd4#
- 1...Bg2
- 2.Bd3#
- 1...Bf6
- 2.Kxf6#
- 1...Sc6
- 2.Kd7#
- 1...Rxa4!
- threat
- 1.Bf6?
- threat
- 2.Ke7#
- 1...Rxd6+
- 2.Kxd6#
- 1...Bxf5+
- 2.Kxf5#
- 1...Bxf6
- 2.Kxf6#
- 1...Ra5
- 2.Rd4#
- 1...Bg2
- 2.Bd3#
- 1...Sc6
- 2.Kd7#
- 1...Rxa4!
- threat
- 1.Bd8?
- threat
- 2.Ke7#
- 1...Rxd6+
- 2.Kxd6#
- 1...Bxf5+
- 2.Kxf5#
- 1...Ra5
- 2.Rd4#
- 1...Bg2
- 2.Bd3#
- 1...Bf6
- 2.Kxf6#
- 1...Sc6
- 2.Kd7#
- 1...Rxa4!
- threat
- 1.Rb6?
- threat
- 2.Kd6#
- 1...Rxb6+
- 2.Sxb6#
- 1...Bxf5+
- 2.Kxf5#
- 1...Bxe5
- 2.Kxe5#
- 1...Ra5
- 2.Rb4#
- 1...Bg2
- 2.Bd3#
- 1...Qxa3!
- threat
- 1.Rc6+?
- 1...Sxc6
- 2.Kd6#
- 2.Kd7#
- 1...bxc6
- 2.Kd6#
- 1...Rxc6+!
- 1...Sxc6
- 1.Kf7?
- Keys
- 1.Bf8!
- threat
- 2.Ke7#
- 1...Rxd6+
- 2.Kxd6#
- 1...Bxf5+
- 2.Kxf5#
- 1...Rxa4
- 2.Rd4#
- 1...Ra5
- 2.Rd4#
- 1...Bg2
- 2.Bd3#
- 1...Bf6
- 2.Kxf6#
- 1...Sc6
- 2.Kd7#
- threat
- 1.Bf8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- Q(a);OGATE::P(A),XQ(a)
- R(e);N_PINR(G),XS(D)::R1(G)
- R(e);N_PINR(G)::R1(G)
- R(e);CHECK,XR(G)::QAB(K)+K(H),XR(e)
- B(c);N_PINB(F)::B(F)
- B(c);N_GUARD::QAR(K),XB(c)
- B(c);CHECK,XB(F)::QAB(K)+K(H),XB(c)
- B(i);XP(E)::QAB(K)+K(H),XB(i)
- B(i);::QAB(K)+K(H),XB(i)
- S(h);N_PINR(G)::QAB(K)+K(H)
- S(h);::QAB(K)+K(H),XS(h)
- P(g);N_PINR(G)::R1(G)
- Tries
- Try
- K(H);N_SPINB(F),N_SPINR(G),S_FLIGHT
- Threat
- DUALS(5)
- Vars
- R(e);XS(D)::R1(G)
- B(c);XB(F)::R1(G)
- Refutation
- R(e);XR(G)
- Try
- B(F);N_SPINB(F),XB(c)
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,XR(G)::QAB(K)+K(H),XR(e)
- R(e);N_PINR(G),XS(D)::R1(G)
- P(b);P_PINP(E)::QAB(K)+K(H)
- B(i);::QAB(K)+K(H)
- Refutation
- Q(a);XP(A)
- Try
- B(F);
- Threat
- QAB(K)+K(H)
- Vars
- R(e);CHECK,XR(G)::QAB(K)+K(H),XR(e)
- B(c);CHECK,OGATE,XB(F)::QAR(K),XB(c)
- R(e);N_PINR(G),XS(D)::R1(G)
- R(e);N_PINR(G)::R1(G)
- B(c);N_PINB(F)::B(F),XP(b)
- Refutation
- Q(a);XP(A)
- Try
- B(J);
- Threat
- QAB(K)+K(H)
- Vars
- R(e);CHECK,XR(G)::QAB(K)+K(H),XR(e)
- B(c);CHECK,XB(F)::QAB(K)+K(H),XB(c)
- R(e);N_PINR(G)::R1(G)
- B(c);N_PINB(F)::B(F)
- B(i);::QAB(K)+K(H),XB(i)
- S(h);N_PINR(G)::QAB(K)+K(H)
- Refutation
- R(e);N_PINR(G),XS(D)
- Try
- B(J);
- Threat
- QAB(K)+K(H)
- Vars
- R(e);CHECK,XR(G)::QAB(K)+K(H),XR(e)
- B(c);CHECK,XB(F)::QAB(K)+K(H),XB(c)
- R(e);N_PINR(G)::R1(G)
- B(c);N_PINB(F)::B(F)
- B(i);::QAB(K)+K(H),XB(i)
- S(h);N_PINR(G)::QAB(K)+K(H)
- Refutation
- R(e);N_PINR(G),XS(D)
- Try
- B(J);
- Threat
- QAB(K)+K(H)
- Vars
- R(e);CHECK,XR(G)::QAB(K)+K(H),XR(e)
- B(c);CHECK,XB(F)::QAB(K)+K(H),XB(c)
- B(i);XB(J)::QAB(K)+K(H),XB(i)
- R(e);N_PINR(G)::R1(G)
- B(c);N_PINB(F)::B(F)
- S(h);N_PINR(G)::QAB(K)+K(H)
- Refutation
- R(e);N_PINR(G),XS(D)
- Try
- B(J);
- Threat
- QAB(K)+K(H)
- Vars
- R(e);CHECK,XR(G)::QAB(K)+K(H),XR(e)
- B(c);CHECK,XB(F)::QAB(K)+K(H),XB(c)
- R(e);N_PINR(G)::R1(G)
- B(c);N_PINB(F)::B(F)
- B(i);::QAB(K)+K(H),XB(i)
- S(h);N_PINR(G)::QAB(K)+K(H)
- Refutation
- R(e);N_PINR(G),XS(D)
- Try
- R(G);
- Threat
- QAB(K)+K(H)
- Vars
- R(e);CHECK,XR(G)::S(D),XR(e)
- B(c);CHECK,XB(F)::QAB(K)+K(H),XB(c)
- B(i);XP(E)::QAB(K)+K(H),XB(i)
- R(e);N_PINR(G)::R1(G)
- B(c);N_PINB(F)::B(F)
- Refutation
- Q(a);XR(B)
- Try
- R(G);CHECK
- Vars
- P(g);XR(G)::QAB(K)+K(H)
- Refutation
- R(e);CHECK,XR(G)
- Try
- Actual
- B(J);
- Threat
- QAB(K)+K(H)
- Vars
- R(e);CHECK,XR(G)::QAB(K)+K(H),XR(e)
- B(c);CHECK,XB(F)::QAB(K)+K(H),XB(c)
- R(e);N_PINR(G),XS(D)::R1(G)
- R(e);N_PINR(G)::R1(G)
- B(c);N_PINB(F)::B(F)
- B(i);::QAB(K)+K(H),XB(i)
- S(h);N_PINR(G)::QAB(K)+K(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).