MESON Chess Problem Database

Problem Display
PID: 99076 (8/2K5/kp6/p7/8/3P4/7Q/6B1 w - - 0 1)

Caplin, Aleksandr Borisovich

Magyar Sakkelet, 1990

8/2K5/kp6/p7/8/3P4/7Q/6B1

#2

4 + 3

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qd6#
      • 2.Qh6#
  • Tries
    • 1.Qf4?
      • 1...Kb5
        • 2.Qc4#
      • 1...a4
        • 2.Qxa4#
      • 1...b5
        • 2.Qd6#
        • 2.Qh6#
        • 2.Qf6#
      • 1...Ka7!
    • 1.Qe5?
      • 1...Ka7
        • 2.Qxa5#
      • 1...b5
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qe6#
      • 1...a4!
    • 1.Qb2?
      • threat
        • 2.Qxb6#
      • 1...b5
        • 2.Qf6#
      • 1...Ka7!
    • 1.Qc2?
      • 1...Kb5
        • 2.Qc4#
      • 1...a4
        • 2.Qxa4#
      • 1...b5
        • 2.Qc6#
      • 1...Ka7!
    • 1.Qh4?
      • 1...Kb5
        • 2.Qc4#
      • 1...a4
        • 2.Qxa4#
      • 1...b5
        • 2.Qf6#
        • 2.Qh6#
      • 1...Ka7!
    • 1.Qh5?
      • 1...Ka7
        • 2.Qxa5#
      • 1...b5
        • 2.Qg6#
        • 2.Qh6#
      • 1...a4!
  • Keys
    • 1.Qa2!
      • 1...Kb5
        • 2.Qc4#
      • 1...Ka7
        • 2.Qxa5#
      • 1...a4
        • 2.Qxa4#
      • 1...b5
        • 2.Qe6#

Anticipated by 11699(1971)

This anticipates 159218(1996), 247013(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR2(B),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(c)
      • Vars
        • P(c);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(a);OGATEB::QAR2(B),XP(a)
        • P(c);OGATEB::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR2(B),XP(a)
      • Refutation
        • P(a);
  • Actual
    • Q(B);P_PINP(a)
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::QAB1(B)
      • K(b);P-FLIGHT::QAR2(B),XP(a)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(c);OGATEB,SBLOCK::QAR(B)
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