MESON Chess Problem Database

Problem Display
PID: 213406 (8/8/3K1p2/8/2pk4/3p1P2/3Q4/8 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1973

8/8/3K1p2/8/2pk4/3p1P2/3Q4/8

#2

3 + 4

15148 Sadier Collection 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qf4#
  • Tries
    • 1.Qc1?
      • 1...d2
        • 2.Qxd2#
      • 1...c3
        • 2.Qf4#
      • 1...f5!
    • 1.Qa5?
      • 1...d2
        • 2.Qxd2#
      • 1...c3
        • 2.Qc5#
      • 1...f5
        • 2.Qe5#
      • 1...Ke3!
  • Keys
    • 1.Qe1!
      • 1...d2
        • 2.Qxd2#
      • 1...c3
        • 2.Qe4#
      • 1...f5
        • 2.Qe5#

This anticipates 230408(1976)

There are these versions: 214977

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAR2(A)
  • Tries
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • P(a);OGATEB::QAR2(A),XP(a)
        • P(b);SBLOCK::QAR2(A)
      • Refutation
        • P(d);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • P(a);OGATEB::QAR2(A),XP(a)
        • P(b);::QAB1(A)
        • P(d);N_GUARD::QAB1(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(b);SBLOCK::QAR1(A)
      • P(d);N_GUARD::QAB1(A)
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