MESON Chess Problem Database

Problem Display
PID: 64536 (Br1R1n2/1q1n1K2/Np1bp3/1P1kpN2/2p3p1/5r2/6Q1/B3R3 w - - 0 1)

Heydon, Joseph Kentigern

Good Companions (November), 1920

Br1R1n2/1q1n1K2/Np1bp3/1P1kpN2/2p3p1/5r2/6Q1/B3R3

#2

9 + 12

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Bxc6#
    • 1...Rxd8
      • 2.Bxb7#
    • 1...Ba3
      • 2.Rxe5#
    • 1...Bb4
      • 2.Rxe5#
    • 1...Bc5
      • 2.Sc7#
      • 2.Rxe5#
    • 1...Be7
      • 2.Rxe5#
    • 1...Sc5+
      • 2.Sc7#
    • 1...Sf6+
      • 2.Se7#
    • 1...c3
      • 2.Qa2#
  • Tries
    • 1.Sb4+?
      • 1...Bxb4
        • 2.Rxe5#
      • 1...Kc5!
    • 1.Qxf3+?
      • 1...e4
        • 2.Se3#
        • 2.Rd1#
        • 2.Qd1#
        • 2.Qxe4#
      • 1...gxf3!
  • Keys
    • 1.Re3!
      • threat
        • 2.Qd2#
      • 1...Sc5+
        • 2.Sc7#
      • 1...Sf6+
        • 2.Se7#
      • 1...c3
        • 2.Qa2#
      • 1...Bb4
        • 2.Rxe5#
      • 1...Bc5
        • 2.Sc7#
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(i);OGATE::B(H),XQ(i)
    • R(k);N_GUARD,XR(I)::B(H),XQ(i)
    • B(g);N_GUARD,P_SPINS(j)::R1(B),XP(e)
    • S(j);CHECK,P_SPINB(g),SBLOCK::S(F)
    • S(j);CHECK,N_PINS(E),P_SPINB(g)::S(E)
    • P(b);OGATEB::QAB(C)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(g);P_SPINS(j),XS(F)::R1(B),XP(e)
      • Refutation
        • K(d);N_SPINQ(i),N_SPINR(a),P-FLIGHT
    • Try
      • Q(C);CHECK,N_SPINS(E),XR(a)
      • Refutation
        • P(c);XQ(C)
  • Actual
    • R(B);
    • Threat
      • QAR(C)
    • Vars
      • S(j);CHECK,P_SPINB(g),SBLOCK::S(F)
      • S(j);CHECK,N_PINS(E),P_SPINB(g)::S(E)
      • P(b);OGATEB::QAB(C)
      • B(g);N_GUARD,P_SPINS(j)::R1(B),XP(e)
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