MESON Chess Problem Database
Problem Display
PID: 124535 (2K1R3/1pNP1p2/1N2qP2/n1B1k1P1/5p2/1prBp3/nQ6/8 w - - 0 1)
Opdenoordt, Joseph J
Grantham Journal, 1927
(First published on Sat Apr 30 1927)
#2
10 + 10
| 6490 | yacpdb | 2009 |
| 14868 | Pirnie Collection | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Qe7
- 2.Rxe7#
- 1...Qxe8+
- 2.dxe8Q#
- 2.dxe8R#
- 1...Sc1
- 2.Qxc3#
- 1...Sb4
- 2.Qxc3#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...e2
- 2.Qxe2#
- 1...f3
- 2.Qh2#
- 1...Qe7
- Tries
- 1.Kb8?
- 1...Qxe8+
- 2.dxe8Q#
- 2.dxe8R#
- 1...f3
- 2.Qh2#
- 1...Qe7
- 2.Rxe7#
- 1...Sc1
- 2.Qxc3#
- 1...Sb4
- 2.Qxc3#
- 1...Sc4
- 2.Sxc4#
- 1...e2
- 2.Qxe2#
- 1...Sc6+!
- 1...Qxe8+
- 1.Kd8?
- 1...Qe7+
- 2.Rxe7#
- 1...Qxe8+
- 2.dxe8Q#
- 2.dxe8R#
- 1...f3
- 2.Qh2#
- 1...Sc1
- 2.Qxc3#
- 1...Sb4
- 2.Qxc3#
- 1...Sc4
- 2.Sxc4#
- 1...e2
- 2.Qxe2#
- 1...Sc6+!
- 1...Qe7+
- 1.Bb1?
- 1...Qxe8+
- 2.dxe8Q#
- 2.dxe8R#
- 1...f3
- 2.Qh2#
- 1...Sc4
- 2.Sxc4#
- 1...Qe7
- 2.Rxe7#
- 1...Sc1
- 2.Qxc3#
- 1...Sb4
- 2.Qxc3#
- 1...Sc6
- 2.Sc4#
- 1...e2!
- 1...Qxe8+
- 1.Bh7?
- 1...Qxe8+
- 2.dxe8Q#
- 2.dxe8R#
- 1...f3
- 2.Qh2#
- 1...Sc4
- 2.Sxc4#
- 1...Qe7
- 2.Rxe7#
- 1...Sc1
- 2.Qxc3#
- 1...Sb4
- 2.Qxc3#
- 1...Sc6
- 2.Sc4#
- 1...e2!
- 1...Qxe8+
- 1.Re7?
- 1...f3
- 2.Qh2#
- 1...Sc4
- 2.Sxc4#
- 1...Sc1
- 2.Qxc3#
- 1...Sb4
- 2.Qxc3#
- 1...Sc6
- 2.Sc4#
- 1...e2
- 2.Qxe2#
- 1...Qxe7!
- 1...f3
- 1.Kb8?
- Keys
- 1.Sb5!
- 1...Qxe8+
- 2.dxe8Q#
- 2.dxe8R#
- 1...Qe7
- 2.Rxe7#
- 1...f3
- 2.Qh2#
- 1...Sc4
- 2.Bd4#
- 1...Sc1
- 2.Qxc3#
- 1...Sb4
- 2.Qxc3#
- 1...Sc6
- 2.Bd6#
- 1...e2
- 2.Qxe2#
- 1...Qxe8+
- 1.Sb5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(h);N_PINP(H),OGATEB::R(J),XQ(h)
- Q(h);CHECK,N_PINP(H),N_SPINQ(h),XR(J)::PXQ(h)=Q
- S(a);N_GUARD::QAB(A),XR(c)
- S(f);N_GUARD::S(E),XS(f)
- S(f);N_GUARD::S(E)
- P(d);OGATEB::QAR(A),XP(d)
- P(e);OGATEB::QAB(A)
- Tries
- Try
- K(I);N_SPINP(H),P-FLIGHT
- Vars
- Q(h);CHECK,N_SPINQ(h),OGATE,XR(J)::PXQ(h)=Q
- P(e);OGATEB::QAB(A)
- Q(h);OGATEB::R(J),XQ(h)
- S(a);N_GUARD::QAB(A),XR(c)
- S(f);N_GUARD::S(E),XS(f)
- P(d);OGATEB::QAR(A),XP(d)
- Refutation
- S(f);CHECK
- Try
- K(I);N_SPINP(H),P-FLIGHT
- Vars
- Q(h);CHECK,OGATEB::R(J),XQ(h)
- Q(h);CHECK,N_SPINQ(h),OGATE,XR(J)::PXQ(h)=Q
- P(e);OGATEB::QAB(A)
- S(a);N_GUARD::QAB(A),XR(c)
- S(f);N_GUARD::S(E),XS(f)
- P(d);OGATEB::QAR(A),XP(d)
- Refutation
- S(f);CHECK
- Try
- B(B);
- Vars
- Q(h);CHECK,N_PINP(H),N_SPINQ(h),XR(J)::PXQ(h)=Q
- P(e);OGATEB::QAB(A)
- S(f);N_GUARD::S(E),XS(f)
- Q(h);N_PINP(H),OGATEB::R(J),XQ(h)
- S(a);N_GUARD::QAB(A),XR(c)
- S(f);N_GUARD::S(E)
- Refutation
- P(d);
- Try
- B(B);
- Vars
- Q(h);CHECK,N_PINP(H),N_SPINQ(h),XR(J)::PXQ(h)=Q
- P(e);OGATEB::QAB(A)
- S(f);N_GUARD::S(E),XS(f)
- Q(h);N_PINP(H),OGATEB::R(J),XQ(h)
- S(a);N_GUARD::QAB(A),XR(c)
- S(f);N_GUARD::S(E)
- Refutation
- P(d);
- Try
- R(J);
- Vars
- P(e);OGATEB::QAB(A)
- S(f);N_GUARD::S(E),XS(f)
- S(a);N_GUARD::QAB(A),XR(c)
- S(f);N_GUARD::S(E)
- P(d);OGATEB::QAR(A),XP(d)
- Refutation
- Q(h);N_PINP(H),N_SPINQ(h),XR(J)
- Try
- Actual
- S(G);P_SPINB(C)
- Vars
- Q(h);CHECK,N_PINP(H),N_SPINQ(h),XR(J)::PXQ(h)=Q
- Q(h);N_PINP(H),OGATEB::R(J),XQ(h)
- P(e);OGATEB::QAB(A)
- S(f);N_PINB(C)::B(C)
- S(a);N_GUARD::QAB(A),XR(c)
- P(d);OGATEB::QAR(A),XP(d)
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).