MESON Chess Problem Database

Problem Display
PID: 60811 (1qR4b/p3N3/2p5/Qb6/2kp1p2/3R4/8/1BK5 w - - 0 1)

Promislo, Charles

Good Companions (October), 1917

1qR4b/p3N3/2p5/Qb6/2kp1p2/3R4/8/1BK5

#2

6 + 8

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Rxc6#
    • 1...Ba6
      • 2.Rxc6#
  • Tries
    • 1.Ba2+?
      • 1...Kc5
        • 2.Rxc6#
      • 1...Kxd3!
  • Keys
    • 1.Rb3!
      • threat
        • 2.Qb4#
      • 1...Kxb3
        • 2.Ba2#
      • 1...Kc5
        • 2.Rxc6#
      • 1...Qd6
        • 2.Qxb5#
      • 1...Ba4
        • 2.Qd5#
      • 1...Ba6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINB(d)::R1(F),XP(e)
    • B(d);N_GUARD::R(F),XP(e)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINB(d)::R1(F),XP(e)
      • Refutation
        • K(a);N_SPINP(e),S_FLIGHT,XR(C)
  • Actual
    • R(C);
    • Threat
      • QAR1(D)
    • Vars
      • K(a);N_SPINP(e),OGATEB,S_FLIGHT,XR(C)::B(A)
      • K(a);P-FLIGHT,P_SPINB(d)::R1(F),XP(e)
      • Q(g);N_GUARD::QAB1(D),XB(d)
      • B(d);OGATE::QAB1(D)
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