MESON Chess Problem Database

Problem Display
PID: 21824 (B7/1R2Q3/1P6/3k3N/3n2K1/2B5/3b4/3R4 w - - 0 1)

Watney, Charles Gold

3rd HM.=, Good Companions (March Meredith Ty.), 1921

B7/1R2Q3/1P6/3k3N/3n2K1/2B5/3b4/3R4

#2

8 + 3

3132 The Good Companion Two-Mover 1922
3391 Het Half Pin Thema 1924
887 Mate in Two Moves 1931
3310 2345 Chess Problems 1997
56 The Problemist 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Rc7#
    • 1...Be1
      • 2.Rc7#
    • 1...Bxc3
      • 2.Rc7#
    • 1...Be3
      • 2.Rc7#
    • 1...Bf4
      • 2.Rc7#
    • 1...Bg5
      • 2.Rc7#
    • 1...Bh6
      • 2.Rc7#
    • 1...Sc2
      • 2.Rc7#
    • 1...Se2
      • 2.Rc7#
    • 1...Sb3
      • 2.Rc7#
    • 1...Sf3
      • 2.Rc7#
    • 1...Sb5
      • 2.Rc7#
    • 1...Sf5
      • 2.Rc7#
    • 1...Se6
      • 2.Rc7#
  • Tries
    • 1.Sf4+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Bxf4
        • 2.Rc7#
      • 1...Kc6!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qxd4#
      • 1...Ke6
        • 2.Re7#
      • 1...Kxc5!
  • Keys
    • 1.Qb4!
      • 1...Ke4
        • 2.Qxd4#
      • 1...Ke5
        • 2.Re7#
      • 1...Kc6
        • 2.Ra7#
        • 2.Rc7#
        • 2.Re7#
        • 2.Rf7#
        • 2.Rg7#
        • 2.Rh7#
      • 1...Ke6
        • 2.Re7#
      • 1...Bxc3
        • 2.Re7#
      • 1...Sc6
        • 2.Sf4#
      • 1...Bc1
        • 2.Re7#
      • 1...Be1
        • 2.Re7#
      • 1...Be3
        • 2.Re7#
      • 1...Bf4
        • 2.Re7#
      • 1...Bg5
        • 2.Re7#
      • 1...Bh6
        • 2.Re7#
      • 1...Sc2
        • 2.Re7#
      • 1...Se2
        • 2.Re7#
      • 1...Sb3
        • 2.Re7#
      • 1...Sf3
        • 2.Re7#
      • 1...Sb5
        • 2.Re7#
      • 1...Sf5
        • 2.Re7#
      • 1...Se6
        • 2.Ra7#
        • 2.Rc7#
        • 2.Rd7#
        • 2.Re7#
        • 2.Rf7#
        • 2.Rg7#
        • 2.Rh7#
        • 2.Rb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 13
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);P_SPINS(b)::B(H)+R(F)
    • B(a);P_SPINS(b),XB(B)::B(H)+R(F)
    • S(b);N_GUARD,P_SPINB(a)::B(H)+R(F)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(G)
        • B(a);P_SPINS(b),XS(D)::B(H)+R(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(G),XS(b)
        • K(c);S_FLIGHT::R1(F)
      • Refutation
        • K(c);P-FLIGHT,XQ(G)
  • Actual
    • Q(G);
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::QAR1(G),XS(b)
      • K(c);P-FLIGHT,P_SPINS(b)::R(F)
      • K(c);S_FLIGHT::R1(F)
      • B(a);P_SPINS(b),XB(B)::B(H)+R(F)
      • S(b);P_SPINB(a),SBLOCK::S(D)
      • B(a);P_SPINS(b)::B(H)+R(F)
      • S(b);N_GUARD,P_SPINB(a)::B(H)+R(F)
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