MESON Chess Problem Database
Problem Display
PID: 107923 (8/8/n1n1p3/5p1R/N1p1kpN1/2PR4/8/1Q2K3 w - - 0 1)
Collins, Francis Charles
Toronto Globe, 1881
#2
7 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Sab4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sab8
- 2.Sc5#
- 1...Se5
- 2.Sf2#
- 2.Sf6#
- 1...f3
- 2.Rd4#
- 1...fxg4
- 2.Rg3#
- 2.Rdh3#
- 1...e5
- 2.Sf2#
- 2.Sf6#
- 1...Sab4
- Tries
- 1.Kd2?
- threat
- 2.Qe1#
- 1...cxd3
- 2.Qxd3#
- 1...f3
- 2.Rd4#
- 1...Sd4!
- threat
- 1.Ke2?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Sd4+
- 2.Rxd4#
- 1...cxd3+
- 2.Qxd3#
- 1...Sab4
- 2.Sc5#
- 2.Rd4#
- 1...Sc5
- 2.Sxc5#
- 2.Rd4#
- 1...Scb4
- 2.Rd4#
- 1...Se5
- 2.Sf2#
- 2.Sf6#
- 2.Rd4#
- 1...Sd8
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Rd6#
- 2.Rd7#
- 2.Rxd8#
- 1...f3+!
- threat
- 1.Kf2?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Sd4
- 2.Rxd4#
- 1...f3
- 2.Rd4#
- 1...Sab4
- 2.Sc5#
- 2.Rd4#
- 1...Sc5
- 2.Sxc5#
- 2.Rd4#
- 1...Scb4
- 2.Rd4#
- 1...Se5
- 2.Sf6#
- 2.Rd4#
- 1...Sd8
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Rd6#
- 2.Rd7#
- 2.Rxd8#
- 1...cxd3!
- threat
- 1.Sb6?
- threat
- 2.Re3#
- 2.Rg3#
- 2.Rdh3#
- 1...fxg4
- 2.Rg3#
- 2.Rdh3#
- 1...f3
- 2.Rd4#
- 1...Sab4
- 2.Re3#
- 1...Sc5
- 2.Re3#
- 1...Scb4
- 2.Re3#
- 1...Sd4
- 2.Re3#
- 1...Se5
- 2.Sf2#
- 2.Sf6#
- 2.Re3#
- 1...cxd3!
- threat
- 1.Rhh3?
- threat
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...cxd3
- 2.Qxd3#
- 1...Sd4
- 2.Rxd4#
- 1...f3
- 2.Rd4#
- 1...Sab4
- 2.Sc5#
- 2.Rd4#
- 1...Sc5
- 2.Sxc5#
- 2.Rd4#
- 1...Scb4
- 2.Rd4#
- 1...Se5
- 2.Sf2#
- 2.Sf6#
- 2.Rd4#
- 1...Sd8
- 2.Rd1#
- 2.Rd2#
- 2.Rd4#
- 2.Rd6#
- 2.Rd7#
- 2.Rxd8#
- 1...fxg4!
- threat
- 1.Qd1?
- threat
- 2.Qe2#
- 2.Qf3#
- 1...fxg4
- 2.Qe2#
- 1...Sd4
- 2.Rxd4#
- 1...f3
- 2.Qxf3#
- 1...Se5
- 2.Sf2#
- 2.Sf6#
- 2.Rd4#
- 2.Qe2#
- 1...cxd3!
- threat
- 1.Qb6?
- 1...Kxd3
- 2.Qb1#
- 1...cxd3
- 2.Qxc6#
- 1...Sd4
- 2.Qxd4#
- 1...f3
- 2.Qe3#
- 1...Sab4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sab8
- 2.Sc5#
- 1...Scb4
- 2.Qd4#
- 1...Sa5
- 2.Qd4#
- 1...Se5
- 2.Sf2#
- 2.Qd4#
- 1...Sa7
- 2.Qd4#
- 1...Se7
- 2.Qd4#
- 1...Scb8
- 2.Qd4#
- 1...Sd8
- 2.Qd4#
- 1...e5
- 2.Sf2#
- 1...fxg4!
- 1...Kxd3
- 1.Kd2?
- Keys
- 1.Qb7!
- 1...Kxd3
- 2.Qb1#
- 1...cxd3
- 2.Qxc6#
- 1...fxg4
- 2.Qh7#
- 1...f3
- 2.Rd4#
- 1...Sb4
- 2.Sc5#
- 1...Sc5
- 2.Sxc5#
- 1...Sc7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...e5
- 2.Sf2#
- 1...Kxd3
- 1.Qb7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- P(c);SBLOCK::QAB(A)+R(D),DCHECK
- Tries
- Try
- K(B);S_FLIGHT
- Threat
- QAR(A)
- Vars
- P(a);OGATE,P_SPINP(a),XR(D)::QAB1(A),XP(a)
- P(c);SBLOCK::QAB(A)+R(D),DCHECK
- Refutation
- S(f);
- Try
- K(B);P-FLIGHT
- Threat
- DUALS(6)
- Vars
- S(f);CHECK::QAB(A)+R(D),DCHECK,XS(f)
- P(a);CHECK,OGATE,P_SPINP(a),XR(D)::QAB1(A),XP(a)
- S(f);::QAB(A)+R(D),DCHECK
- Refutation
- P(c);CHECK
- Try
- K(B);S_FLIGHT
- Threat
- DUALS(6)
- Vars
- S(f);::QAB(A)+R(D),DCHECK,XS(f)
- P(c);::QAB(A)+R(D),DCHECK
- S(f);::QAB(A)+R(D),DCHECK
- Refutation
- P(a);P_SPINP(a),XR(D)
- Try
- S(E);
- Threat
- DUALS(3)
- Vars
- P(c);SBLOCK::QAB(A)+R(D),DCHECK
- S(e);::QAB(A)+R(D),DCHECK
- S(f);::QAB(A)+R(D),DCHECK
- Refutation
- P(a);P_SPINP(a),XR(D)
- Try
- R(G);
- Threat
- DUALS(6)
- Vars
- P(a);OGATE,P_SPINP(a),XR(D)::QAB1(A),XP(a)
- S(f);::QAB(A)+R(D),DCHECK,XS(f)
- P(c);::QAB(A)+R(D),DCHECK
- S(f);::QAB(A)+R(D),DCHECK
- Refutation
- P(d);XS(F)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- P(d);XS(F)::QAR2(A)
- S(f);N_GUARD::R1(D),XS(f)
- P(c);::QAB1(A),XP(c)
- Refutation
- P(a);XR(D)
- Try
- Q(A);
- Vars
- K(b);OGATEB,S_FLIGHT,XR(D)::QAB(A)
- P(a);SBLOCK,XR(D)::QAB(A),XS(f)
- S(f);N_GUARD::QAR1(A),XS(f)
- P(c);N_GUARD::QAR1(A)
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- S(f);N_GUARD::QAR1(A)
- P(g);SBLOCK::S(F)
- Refutation
- P(d);XS(F)
- Try
- Actual
- Q(A);P_PINS(f)
- Vars
- K(b);N_SPINS(f),OGATEB,S_FLIGHT,XR(D)::QAB(A)
- P(a);SBLOCK,XR(D)::QAB(A),XS(f)
- P(d);OGATEB,XS(F)::QAB(A)
- P(c);SBLOCK::R1(D)
- S(e);N_GUARD::S(E)
- S(e);N_GUARD::S(E),XS(e)
- P(g);SBLOCK::S(F)
Developed and maintained by Brian Stephenson.
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