MESON Chess Problem Database

Problem Display
PID: 145573 (8/r1p2B1K/4RQ1p/pk6/p6r/8/5b2/2R1B3 w - - 0 1)

Grabowski, Kazimierz

Good Companions (October), 1917

8/r1p2B1K/4RQ1p/pk6/p6r/8/5b2/2R1B3

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qb2#
    • 1...Rh2
      • 2.Qb2#
    • 1...Rh5
      • 2.Qb2#
    • 1...Bd4
      • 2.Qf1#
    • 1...c5
      • 2.Rb6#
  • Tries
    • 1.Re5+?
      • 1...Bc5
        • 2.Rcxc5#
        • 2.Rexc5#
      • 1...c5!
    • 1.Qe5+?
      • 1...Bc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...c5!
    • 1.Qf5+?
      • 1...Bc5
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...c5!
  • Keys
    • 1.Re4!
      • threat
        • 2.Qc6#
      • 1...Bb6
        • 2.Qf1#
      • 1...c6
        • 2.Qxc6#
      • 1...Ra6
        • 2.Qb2#
      • 1...Bc5
        • 2.Bc4#
      • 1...c5
        • 2.Rb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::QAR(D)
    • B(a);OGATE::QAB(D)
    • P(h);N_GUARD,P_PINB(E),S_CUTB(a)::R1(C)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • P(h);P_PINB(E),P_SPINP(h)
    • Try
      • Q(D);CHECK
      • Refutation
        • P(h);P_PINB(E),P_SPINP(h)
    • Try
      • Q(D);CHECK
      • Refutation
        • P(h);P_PINB(E),P_SPINP(h)
  • Actual
    • R(C);
    • Threat
      • QAB1(D)
    • Vars
      • B(a);OGATE,SBLOCK::QAB(D)
      • P(h);P_PINB(E)::QAB1(D),XP(h)
      • R(g);SBLOCK::QAR(D)
      • B(a);SBLOCK::B(E)
      • P(h);P_PINB(E),SBLOCK::R(A)
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