MESON Chess Problem Database

Problem Display
PID: 60834 (4RN2/r1k5/p1B1Rp2/8/5qp1/6Q1/5B1b/5K2 w - - 0 1)

Grabowski, Kazimierz

Good Companions (December), 1917

4RN2/r1k5/p1B1Rp2/8/5qp1/6Q1/5B1b/5K2

#2

7 + 7

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qxf4#
  • Tries
    • 1.Be4?
      • threat
        • 2.Qc3#
      • 1...Qxg3
        • 2.Bb6#
      • 1...Qe5
        • 2.Bb6#
      • 1...Qd6
        • 2.R6e7#
      • 1...Bxg3!
    • 1.Qxh2?
      • threat
        • 2.Qxf4#
        • 2.Qh7#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qg3
        • 2.Qxg3#
        • 2.Qh7#
      • 1...Qe5
        • 2.Qh7#
      • 1...g3
        • 2.Qh7#
      • 1...Qxh2!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Bb6#
      • 1...gxf3
        • 2.Qg7#
      • 1...Qd6
        • 2.R6e7#
      • 1...Rb7
        • 2.Rc6#
      • 1...Bg1
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(C),XQ(b)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR(C)
      • Vars
        • Q(b);N_PINB(B),N_SPINQ(b),XQ(C)::B(B)
        • Q(b);N_PINB(B)::B(B)
        • Q(b);N_PINB(B)::R(E)
      • Refutation
        • B(a);N_SPINQ(b),XQ(C)
    • Try
      • Q(C);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_PINB(B),OGATE::QAB1(C),XQ(b)
        • Q(b);N_PINB(B)::QAR(C)
        • P(c);N_SPINQ(b)::QAR(C)
      • Refutation
        • Q(b);N_PINB(B),N_SPINQ(b),XQ(C)
  • Actual
    • B(D);N_SPINB(B)
    • Threat
      • B(B)
    • Vars
      • P(c);OGATE,XB(D)::QAR(C)
      • Q(b);::R(E)
      • R(f);SBLOCK::R1(E)
      • B(a);N_GUARD::QAB(C),XQ(b)
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