MESON Chess Problem Database
Problem Display
PID: 275531 (8/8/N4K2/Q1NpPRp1/1pPk1ppR/2p3p1/2p3B1/2B5 w - - 0 1)
Onkoud, Abdelaziz
Phenix, 2000
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Kxc4
- 2.Qxb4#
- 1...f3
- 2.Rxg4#
- 1...dxc4
- 2.Qd8#
- 1...gxh4
- 2.Rxf4#
- 1...Kxc4
- Tries
- 1.Kxg5?
- 1...Kxc4
- 2.Qxb4#
- 1...dxc4
- 2.Qd8#
- 1...f3
- 2.Rxg4#
- 1...b3!
- 1...Kxc4
- 1.Ke6?
- 1...Kxc4
- 2.Qxb4#
- 1...dxc4
- 2.Qd8#
- 1...gxh4
- 2.Rxf4#
- 1...f3
- 2.Rxg4#
- 1...b3!
- 1...Kxc4
- 1.Sb3+?
- 1...Kxc4
- 2.Qxd5#
- 1...Kd3!
- 1...Kxc4
- 1.Sd3?
- threat
- 2.Qxd5#
- 1...Kxc4
- 2.Qxd5#
- 1...dxc4
- 2.Qd8#
- 2.Qd5#
- 1...Kxd3!
- threat
- 1.Sa4?
- threat
- 2.Qxd5#
- 1...Kxc4
- 2.Qxd5#
- 1...dxc4
- 2.Qd8#
- 2.Qd5#
- 1...Kd3!
- threat
- 1.Se6+?
- 1...Kxc4
- 2.Qxd5#
- 1...Kd3!
- 1...Kxc4
- 1.Sb7?
- threat
- 2.Qxd5#
- 1...Kxc4
- 2.Qxd5#
- 1...dxc4
- 2.Qd8#
- 2.Qd5#
- 1...Kd3!
- threat
- 1.Sd7?
- threat
- 2.Qxd5#
- 1...Kxc4
- 2.Qxd5#
- 1...dxc4
- 2.Qd5#
- 1...Kd3!
- threat
- 1.Sxb4?
- 1...dxc4
- 2.Sxc2#
- 2.Sc6#
- 2.Se6#
- 1...gxh4
- 2.Rxf4#
- 1...f3
- 2.Rxg4#
- 1...Kxc4!
- 1...dxc4
- 1.Be3+?
- 1...Kxc4
- 2.Bf1#
- 2.Qxb4#
- 1...fxe3
- 2.Rxg4#
- 1...Kxe3!
- 1...Kxc4
- 1.Rxg4?
- 1...Kxc4
- 2.Qxb4#
- 1...dxc4
- 2.Qd8#
- 1...b3!
- 1...Kxc4
- 1.Rxg5?
- 1...Kxc4
- 2.Qxb4#
- 1...dxc4
- 2.Qd8#
- 1...f3
- 2.Rhxg4#
- 2.Rgxg4#
- 1...b3!
- 1...Kxc4
- 1.Qxb4?
- threat
- 2.cxd5#
- 1...f3
- 2.Rxg4#
- 1...dxc4!
- threat
- 1.Qb6?
- 1...Kxc4
- 2.Qxb4#
- 1...dxc4
- 2.Qd8#
- 2.Qd6#
- 1...gxh4
- 2.Rxf4#
- 1...f3
- 2.Rxg4#
- 1...b3!
- 1...Kxc4
- 1.Qb5?
- 1...dxc4
- 2.Qd7#
- 1...gxh4
- 2.Rxf4#
- 1...f3
- 2.Rxg4#
- 1...b3!
- 1...dxc4
- 1.cxd5?
- threat
- 2.Qxb4#
- 1...Kc4
- 2.Qxb4#
- 1...b3
- 2.Qb4#
- 2.Qa4#
- 1...f3!
- threat
- 1.e6?
- 1...Kxc4
- 2.Qxb4#
- 1...dxc4
- 2.Rd5#
- 2.Qd8#
- 1...gxh4
- 2.Rxf4#
- 1...f3
- 2.Rxg4#
- 1...b3!
- 1...Kxc4
- 1.Kxg5?
- Keys
- 1.Qa4!
- 1...Kxc4
- 2.Qxb4#
- 1...dxc4
- 2.Qd7#
- 1...gxh4
- 2.Rxf4#
- 1...b3
- 2.cxd5#
- 1...f3
- 2.Rxg4#
- 1...Kxc4
- 1.Qa4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(e);OGATEB,P-FLIGHT,XP(C)::QAR1(E),XP(d)
- P(f);OGATEB,P_SPINP(g)::R(D),XP(g)
- P(h);OGATEB,SBLOCK,XP(C)::QAR(E)
- P(i);N_GUARD,XR(D)::R(H),XP(f)
- Tries
- Try
- K(J);S_FLIGHT,XP(i)
- Vars
- K(e);OGATEB,P-FLIGHT,XP(C)::QAR1(E),XP(d)
- P(h);OGATEB,SBLOCK,XP(C)::QAR(E)
- P(f);OGATEB,P_SPINP(g)::R(D),XP(g)
- Refutation
- P(d);
- Try
- K(J);P-FLIGHT
- Vars
- K(e);OGATEB,P-FLIGHT,XP(C)::QAR1(E),XP(d)
- P(h);OGATEB,SBLOCK,XP(C)::QAR(E)
- P(i);N_GUARD,XR(D)::R(H),XP(f)
- P(f);OGATEB,P_SPINP(g)::R(D),XP(g)
- Refutation
- P(d);
- Try
- S(F);CHECK
- Vars
- K(e);P-FLIGHT,XP(C)::QAB1(E),XP(h)
- Refutation
- K(e);P-FLIGHT
- Try
- S(F);
- Threat
- QAR1(E),XP(h)
- Vars
- K(e);P-FLIGHT,XP(C)::QAB1(E),XP(h)
- Refutation
- K(e);P-FLIGHT,XS(F)
- Try
- S(F);
- Threat
- QAR1(E),XP(h)
- Vars
- K(e);P-FLIGHT,XP(C)::QAB1(E),XP(h)
- Refutation
- K(e);P-FLIGHT
- Try
- S(F);CHECK
- Vars
- K(e);P-FLIGHT,XP(C)::QAB1(E),XP(h)
- Refutation
- K(e);P-FLIGHT
- Try
- S(F);
- Threat
- QAR1(E),XP(h)
- Vars
- K(e);P-FLIGHT,XP(C)::QAB1(E),XP(h)
- Refutation
- K(e);P-FLIGHT
- Try
- S(F);
- Threat
- QAR1(E),XP(h)
- Vars
- K(e);P-FLIGHT,XP(C)::QAB1(E),XP(h)
- P(h);XP(C)::QAR1(E)
- Refutation
- K(e);P-FLIGHT
- Try
- S(I);XP(d)
- Vars
- P(i);N_GUARD,XR(D)::R(H),XP(f)
- P(f);OGATEB,P_SPINP(g)::R(D),XP(g)
- Refutation
- K(e);P-FLIGHT,XP(C)
- Try
- B(A);CHECK
- Vars
- P(f);P_SPINP(g),SBLOCK,XB(A)::R(D),XP(g)
- Refutation
- K(e);S_FLIGHT,XB(A)
- Try
- R(D);P_PINP(f),XP(g)
- Vars
- K(e);OGATEB,P-FLIGHT,XP(C)::QAR1(E),XP(d)
- P(h);OGATEB,SBLOCK,XP(C)::QAR(E)
- Refutation
- P(d);
- Try
- R(H);XP(i)
- Vars
- K(e);OGATEB,P-FLIGHT,XP(C)::QAR1(E),XP(d)
- P(h);OGATEB,SBLOCK,XP(C)::QAR(E)
- Refutation
- P(d);
- Try
- Q(E);XP(d)
- Threat
- QAR(E)+P(C),XP(h)
- Vars
- P(f);OGATEB,P_SPINP(g)::R(D),XP(g)
- Refutation
- P(h);P_SPINP(h),XP(C)
- Try
- Q(E);
- Vars
- K(e);OGATEB,P-FLIGHT,XP(C)::QAR1(E),XP(d)
- P(i);N_GUARD,XR(D)::R(H),XP(f)
- P(f);OGATEB,P_SPINP(g)::R(D),XP(g)
- Refutation
- P(d);
- Try
- Q(E);
- Vars
- P(h);OGATEB,SBLOCK,XP(C)::QAR(E)
- P(i);N_GUARD,XR(D)::R(H),XP(f)
- P(f);OGATEB,P_SPINP(g)::R(D),XP(g)
- Refutation
- P(d);
- Try
- P(C);XP(h)
- Threat
- QAR2(E),XP(d)
- Vars
- K(e);P-FLIGHT::QAR1(E),XP(d)
- Refutation
- P(f);P_SPINP(g)
- Try
- P(G);
- Vars
- K(e);OGATEB,P-FLIGHT,XP(C)::QAR1(E),XP(d)
- P(i);N_GUARD,XR(D)::R(H),XP(f)
- P(f);OGATEB,P_SPINP(g)::R(D),XP(g)
- Refutation
- P(d);
- Try
- Actual
- Q(E);
- Vars
- K(e);OGATEB,P-FLIGHT,P_SPINP(d),XP(C)::QAR1(E),XP(d)
- P(h);OGATEB,SBLOCK,XP(C)::QAR(E)
- P(i);N_GUARD,XR(D)::R(H),XP(f)
- P(d);::QAR(E)+P(C),XP(h)
- P(f);OGATEB,P_SPINP(g)::R(D),XP(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).