MESON Chess Problem Database
Problem Display
PID: 101231 (6bB/1N4n1/Rn4N1/1Ppk1pP1/5p2/b2B1P2/KP2Rpq1/3Q4 w - - 0 1)
Sim, Malcolm
Good Companions, 1918
#2
12 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sa4
- 2.Rd6#
- 1...Sc4
- 2.Be4#
- 1...Sd7
- 2.Rd6#
- 1...Sa8
- 2.Rd6#
- 1...Sh5
- 2.Se7#
- 1...Se6
- 2.Se7#
- 1...Se8
- 2.Sxf4#
- 2.Se7#
- 1...c4
- 2.Bb1#
- 2.Bc2#
- 2.Bxf5#
- 1...Sa4
- Tries
- 1.Kb3?
- threat
- 2.Bb1#
- 2.Bc2#
- 2.Bc4#
- 2.Bxf5#
- 1...Kd4+
- 2.Bc4#
- 1...c4+
- 2.Bxc4#
- 1...Bxb2
- 2.Bc4#
- 1...f1Q
- 2.Bc4#
- 1...f1S
- 2.Bc4#
- 1...f1R
- 2.Bc4#
- 1...Qf1
- 2.Bc4#
- 1...Qh1
- 2.Bc4#
- 1...Qg1
- 2.Bc4#
- 1...Bb4
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 2.Be4#
- 1...Se6
- 2.Se7#
- 2.Bc4#
- 2.Be4#
- 1...Qxf3!
- threat
- 1.Se5?
- threat
- 2.Bc4#
- 2.Bxf5#
- 1...Kd4+
- 2.Bc4#
- 1...Qxf3
- 2.Bc4#
- 1...Bxb2
- 2.Bc4#
- 1...f1Q
- 2.Bc4#
- 1...f1S
- 2.Bc4#
- 1...f1R
- 2.Bc4#
- 1...Qf1
- 2.Bc4#
- 1...Qh1
- 2.Bc4#
- 1...Qg1
- 2.Bc4#
- 1...Bb4
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 1...Se6
- 2.Bc4#
- 2.Be4#
- 1...c4
- 2.Bxc4#
- 2.Bxf5#
- 1...Ke6!
- threat
- 1.Be4+?
- 1...Ke6
- 2.Sd8#
- 2.Qd5#
- 1...Kc4!
- 1...Ke6
- 1.Bxg7?
- threat
- 2.Sxf4#
- 2.Se7#
- 1...Qxf3
- 2.Se7#
- 1...Qh2
- 2.Se7#
- 1...Qg3
- 2.Se7#
- 1...Qg4
- 2.Se7#
- 1...Sc8
- 2.Sxf4#
- 1...c4
- 2.Sxf4#
- 2.Bb1#
- 2.Bc2#
- 2.Bxf5#
- 1...Qxg5!
- threat
- 1.Re4?
- threat
- 2.Sxf4#
- 2.Se7#
- 2.Bb1#
- 2.Bf1#
- 2.Bc2#
- 2.Be2#
- 2.Bc4#
- 1...Qxf3
- 2.Se7#
- 1...Qxg5
- 2.Bb1#
- 2.Bf1#
- 2.Bc2#
- 2.Be2#
- 2.Bc4#
- 1...Bxb2
- 2.Sxf4#
- 2.Se7#
- 2.Bc4#
- 1...f1Q
- 2.Sxf4#
- 2.Se7#
- 2.Bc4#
- 1...f1S
- 2.Sxf4#
- 2.Se7#
- 2.Bc4#
- 1...f1B
- 2.Sxf4#
- 2.Se7#
- 2.Be2#
- 2.Bc4#
- 1...f1R
- 2.Sxf4#
- 2.Se7#
- 2.Bc4#
- 1...Qf1
- 2.Sxf4#
- 2.Se7#
- 2.Bxf1#
- 2.Bc4#
- 1...Qh1
- 2.Sxf4#
- 2.Se7#
- 2.Bf1#
- 2.Bc4#
- 1...Qg1
- 2.Sxf4#
- 2.Se7#
- 2.Bf1#
- 2.Bc4#
- 1...Qh2
- 2.Se7#
- 2.Bb1#
- 2.Bf1#
- 2.Bc2#
- 2.Be2#
- 2.Bc4#
- 1...Qg3
- 2.Se7#
- 2.Bb1#
- 2.Bf1#
- 2.Bc2#
- 2.Be2#
- 2.Bc4#
- 1...Qg4
- 2.Se7#
- 2.Bb1#
- 2.Bf1#
- 2.Bc2#
- 2.Be2#
- 2.Bc4#
- 1...Bb4
- 2.Sxf4#
- 2.Se7#
- 2.Bc4#
- 1...Sc4
- 2.Sxf4#
- 2.Se7#
- 2.Bxc4#
- 1...Sc8
- 2.Sxf4#
- 2.Bb1#
- 2.Bf1#
- 2.Bc2#
- 2.Be2#
- 2.Bc4#
- 1...Sh5
- 2.Se7#
- 2.Bb1#
- 2.Bf1#
- 2.Bc2#
- 2.Be2#
- 2.Bc4#
- 1...Se6
- 2.Se7#
- 2.Bc4#
- 1...c4
- 2.Sxf4#
- 2.Bb1#
- 2.Bf1#
- 2.Bc2#
- 2.Be2#
- 2.Bxc4#
- 1...fxe4!
- threat
- 1.Rxb6?
- threat
- 2.Rd6#
- 1...Se8
- 2.Sxf4#
- 2.Se7#
- 1...c4
- 2.Bb1#
- 2.Bc2#
- 2.Be4#
- 2.Bxf5#
- 1...Kd4+!
- threat
- 1.Qb3+?
- 1...Kd4
- 2.Bxg7#
- 1...Sc4
- 2.Rd6#
- 2.Qxc4#
- 1...c4!
- 1...Kd4
- 1.b3?
- threat
- 2.Bb1#
- 2.Bc2#
- 2.Bc4#
- 2.Bxf5#
- 1...Qxf3
- 2.Bc4#
- 1...f1Q
- 2.Bc4#
- 1...f1S
- 2.Bc4#
- 1...f1R
- 2.Bc4#
- 1...Qf1
- 2.Bc4#
- 1...Qh1
- 2.Bc4#
- 1...Qg1
- 2.Bc4#
- 1...Bc1
- 2.Bc4#
- 1...Bb2
- 2.Bc4#
- 1...Bb4
- 2.Bc4#
- 1...Sc4
- 2.Bxc4#
- 2.Be4#
- 1...Se6
- 2.Se7#
- 2.Bc4#
- 2.Be4#
- 1...c4
- 2.Bb1#
- 2.Bc2#
- 2.Bxc4#
- 2.Bxf5#
- 1...Kd4!
- threat
- 1.Kb3?
- Keys
- 1.Re6!
- threat
- 2.Rd6#
- 1...Kd4
- 2.Bf1#
- 2.Be2#
- 1...Kxe6
- 2.Bc4#
- 1...Bxe6
- 2.Bf1#
- 2.Be2#
- 1...Sxe6
- 2.Se7#
- 1...Sc4
- 2.Be4#
- 1...Sc8
- 2.Bf1#
- 2.Be2#
- 1...Se8
- 2.Sxf4#
- 1...c4
- 2.Bxf5#
- threat
- 1.Re6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- S(h);OGATE::R1(I)
- S(h);SBLOCK::QAR(A)+B(E),DCHECK
- S(i);::S(J)
- Tries
- Try
- K(B);S_FLIGHT
- Threat
- DUALS(4)
- Vars
- K(f);CHECK,P-FLIGHT,P_SPINS(i)::QAR(A)+B(E)
- P(e);CHECK::QAR(A)+B(E),DCHECK,XP(e)
- B(c);XP(C)::QAR(A)+B(E),DCHECK
- P(a);::QAR(A)+B(E),DCHECK
- Q(b);::QAR(A)+B(E),DCHECK
- B(c);::QAR(A)+B(E),DCHECK
- Refutation
- Q(b);P_PINB(E),XP(F)
- Try
- S(J);
- Threat
- DUALS(2)
- Vars
- K(f);CHECK,P-FLIGHT::QAR(A)+B(E)
- Q(b);XP(F)::QAR(A)+B(E),DCHECK
- B(c);XP(C)::QAR(A)+B(E),DCHECK
- P(a);::QAR(A)+B(E),DCHECK
- Q(b);::QAR(A)+B(E),DCHECK
- B(c);::QAR(A)+B(E),DCHECK
- S(h);::QAR(A)+B(E),DCHECK,XS(h)
- Refutation
- K(f);P_SPINS(h),S_FLIGHT
- Try
- B(E);CHECK
- Refutation
- K(f);S_FLIGHT
- Try
- B(L);XS(i)
- Threat
- DUALS(2)
- Vars
- Q(b);XP(F)::S(J)
- Q(b);::S(J)
- S(h);::S(J),XP(d)
- Refutation
- Q(b);XP(H)
- Try
- R(D);
- Threat
- DUALS(7)
- Vars
- Q(b);XP(F)::S(J)
- Refutation
- P(g);XR(D)
- Try
- R(I);XS(h)
- Threat
- R1(I)
- Refutation
- K(f);CHECK,P-FLIGHT,P_SPINS(i)
- Try
- Q(A);CHECK
- Vars
- K(f);P-FLIGHT,P_PINQ(A),P_SPINS(i)::B(L),XS(i)
- Refutation
- P(e);P_SPINP(e)
- Try
- P(C);
- Threat
- DUALS(4)
- Vars
- Q(b);XP(F)::QAR(A)+B(E),DCHECK
- P(a);P_PINR(D)::QAR(A)+B(E),DCHECK
- Q(b);::QAR(A)+B(E),DCHECK
- B(c);::QAR(A)+B(E),DCHECK
- Refutation
- K(f);P-FLIGHT,P_PINP(C),P_SPINS(i)
- Try
- Actual
- R(D);
- Threat
- R1(D)
- Vars
- K(f);P_SPINS(h),S_FLIGHT,XR(D)::B(E)
- S(i);SBLOCK,XR(D)::S(J)
- S(h);SBLOCK::QAR(A)+B(E),DCHECK
- S(i);::S(J),XP(d)
- P(e);SBLOCK::QAR(A)+B(E),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).