MESON Chess Problem Database

Problem Display
PID: 5008 (3b1n2/2pP2pn/2P2k2/R6b/3N2p1/Q1B2PK1/8/1B2R3 w - - 0 1)

Shinkman, William Anthony

Bahn Frei, 1897

3b1n2/2pP2pn/2P2k2/R6b/3N2p1/Q1B2PK1/8/1B2R3

#2

10 + 8

2634 Good Companions (November) 1916
3925 The Golden Argosy 1929
102 Probleemblad 1975

SOLUTION

  • SOUND
  • Sets
    • 1...Bf7
      • 2.Sb3#
      • 2.Se6#
    • 1...Be7
      • 2.Qxe7#
    • 1...Sg6
      • 2.Rf5#
  • Tries
    • 1.Se2+?
      • 1...Ke6
        • 2.Ba2#
      • 1...Kf7!
    • 1.Sb5+?
      • 1...Kg5
        • 2.Qc1#
      • 1...Kf7!
    • 1.Qxf8+?
      • 1...Bf7
        • 2.Sb3#
        • 2.Se6#
        • 2.Re6#
        • 2.Qxd8#
      • 1...Sxf8!
    • 1.Qb3?
      • 1...Sxd7
        • 2.Qe6#
      • 1...gxf3
        • 2.Sxf3#
      • 1...Se6
        • 2.Qxe6#
      • 1...g5
        • 2.Sb5#
      • 1...g6
        • 2.Sc2#
      • 1...Bg6
        • 2.Sc2#
      • 1...Be8
        • 2.dxe8S#
      • 1...Be7
        • 2.Se2#
      • 1...Sg5
        • 2.Sb5#
      • 1...Sg6
        • 2.Rf5#
        • 2.Qe6#
      • 1...Bf7!
  • Keys
    • 1.Qa2!
      • 1...Sxd7
        • 2.Qe6#
      • 1...gxf3
        • 2.Sxf3#
      • 1...Se6
        • 2.Qxe6#
      • 1...g5
        • 2.Sb5#
      • 1...g6
        • 2.Sc2#
      • 1...Bg6
        • 2.Sc2#
      • 1...Bf7
        • 2.Sb3#
      • 1...Be8
        • 2.dxe8S#
      • 1...Be7
        • 2.Se2#
      • 1...Sg5
        • 2.Sb5#
      • 1...Sg6
        • 2.Rf5#
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • B(g);N_GUARD::QAB1(C),XB(g)
    • S(h);SBLOCK::R1(H)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);P-FLIGHT::B(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);CHECK,XS(h)
      • Refutation
        • S(f);XQ(C)
    • Try
      • Q(C);
      • Vars
        • S(h);N_GUARD,XP(J)::QAR1(C)
        • P(a);XP(E)::B(D)+S(G),XP(a)
        • S(h);N_GUARD::QAR1(C),XS(h)
        • P(e);SBLOCK::B(D)+S(G)
        • B(b);SBLOCK::B(D)+S(G)
        • B(b);OGATE::PXB(b)=S
        • B(g);SBLOCK::B(D)+S(G)
        • S(f);SBLOCK::B(D)+S(G)
      • Refutation
        • B(b);
  • Actual
    • Q(C);
    • Vars
      • S(h);N_GUARD,XP(J)::QAR1(C)
      • P(a);XP(E)::B(D)+S(G),XP(a)
      • S(h);N_GUARD::QAR1(C),XS(h)
      • P(e);SBLOCK::B(D)+S(G)
      • B(b);SBLOCK::B(D)+S(G)
      • B(b);OGATE::PXB(b)=S
      • B(g);SBLOCK::B(D)+S(G)
      • S(f);SBLOCK::B(D)+S(G)
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