MESON Chess Problem Database

Problem Display
PID: 11392 (4R1B1/4q3/8/4k3/1Q6/K7/3R4/8 w - - 0 1)

Koldijk, Albert Marinus

Sp. Prize, Elk Wat Wils Wedstrijd, 1938

4R1B1/4q3/8/4k3/1Q6/K7/3R4/8

#2

5 + 2

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rf2?
      • threat
        • 2.Rxe7#
      • 1...Qxe8
        • 2.Qf4#
      • 1...Qe6!
  • Keys
    • 1.Bh7!
      • threat
        • 2.Qd6#
      • 1...Ke6
        • 2.Qxe7#
      • 1...Kf6
        • 2.Qxe7#
      • 1...Qe6
        • 2.Qd4#

This anticipates 28886(1972)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);
      • Threat
        • R(D),XQ(b)
      • Vars
        • Q(b);N_PINQ(C),N_SPINQ(b),XR(D)::QAB1(C)
      • Refutation
        • Q(b);N_PINQ(C)
  • Actual
    • B(E);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(C),XQ(b)
      • K(a);N_SPINQ(b),S_FLIGHT::QAB1(C),XQ(b)
      • Q(b);N_PINQ(C)::QAB1(C)
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