MESON Chess Problem Database

Problem Display
PID: 77680 (8/5N2/1p6/6Q1/1K1kp3/3p4/8/8 w - - 0 1)

Caresmel, Andre

Le Probleme, 1960

8/5N2/1p6/6Q1/1K1kp3/3p4/8/8

#2

3 + 4

3713 Snap 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d2
      • 2.Qxd2#
    • 1...e3
      • 2.Qe5#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Kb5?
      • 1...d2
        • 2.Qxd2#
      • 1...e3
        • 2.Qe5#
      • 1...Kc3!
    • 1.Qf4?
      • 1...Kd5
        • 2.Qd6#
      • 1...d2
        • 2.Qxd2#
      • 1...b5!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Qd6#
      • 1...Ke3!
  • Keys
    • 1.Qc1!
      • 1...Kd5
        • 2.Qc4#
      • 1...d2
        • 2.Qxd2#
      • 1...e3
        • 2.Qc4#
      • 1...b5
        • 2.Qc5#

Anticipated by 110805(1922), 79228(1953)

This anticipates 135534(1988)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR2(B),XP(a)
    • P(c);::QAB1(B)
    • P(d);N_GUARD::QAB1(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(c);::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);P_PINP(c)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAR1(B)
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • P(d);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAB1(B)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(c);SBLOCK::QAR1(B)
      • P(d);N_GUARD::QAB1(B)
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