MESON Chess Problem Database

Problem Display
PID: 244689 (8/8/2pp1K2/3kB3/8/1P6/8/1Q6 w - - 0 1)

Chistyakov, Nikolay

Kudesnik, 1995

8/8/2pp1K2/3kB3/8/1P6/8/1Q6

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qh1#
  • Tries
    • 1.Ba1?
      • threat
        • 2.Qf5#
      • 1...c5
        • 2.Qh1#
      • 1...Kc5!
    • 1.Bb2?
      • threat
        • 2.Qf5#
      • 1...c5
        • 2.Qh1#
      • 1...Kc5!
    • 1.Bc3?
      • threat
        • 2.Qf5#
      • 1...c5
        • 2.Qh1#
      • 1...Kc5!
    • 1.Qc2?
      • threat
        • 2.Qc4#
      • 1...c5
        • 2.Qg2#
      • 1...dxe5!
    • 1.Qf5?
      • threat
        • 2.Ba1#
        • 2.Bb2#
        • 2.Bc3#
      • 1...dxe5
        • 2.Qxe5#
      • 1...c5
        • 2.Qf3#
      • 1...Kc5!
    • 1.Qa1?
      • threat
        • 2.Qd4#
      • 1...Kc5
        • 2.Qa5#
      • 1...dxe5
        • 2.Qxe5#
      • 1...c5
        • 2.Qh1#
        • 2.Qa8#
      • 1...Ke4!
  • Keys
    • 1.Qe1!
      • 1...Kc5
        • 2.Qa5#
      • 1...dxe5
        • 2.Qxe5#
      • 1...c5
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAB(A)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR2(A)
      • Vars
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR2(A)
      • Vars
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR2(A)
      • Vars
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • P(c);XB(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);OGATE,P_SPINP(c),XB(C)::QAR1(A),XP(c)
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(c);OGATE,XB(C)::QAR1(A),XP(c)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • P(c);OGATE,XB(C)::QAR1(A),XP(c)
      • P(b);SBLOCK::QAB(A)
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