MESON Chess Problem Database

Problem Display
PID: 159940 (2Q5/8/1p6/kp6/8/8/1N1K4/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

2Q5/8/1p6/kp6/8/8/1N1K4/8

#2

3 + 3

15148 Sadier Collection 2017
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Qc3#
  • Tries
    • 1.Kc2?
      • 1...Kb4
        • 2.Qc3#
      • 1...b4!
    • 1.Kd3?
      • 1...Kb4
        • 2.Qc3#
      • 1...b4!
    • 1.Qc2?
      • 1...Kb4
        • 2.Qc3#
      • 1...b4
        • 2.Qa4#
      • 1...Ka6!
    • 1.Qe8?
      • 1...Ka6
        • 2.Qa8#
      • 1...b4
        • 2.Qa4#
      • 1...Kb4!
    • 1.Qf8?
      • threat
        • 2.Qa3#
      • 1...Ka6
        • 2.Qa8#
      • 1...b4!
    • 1.Qh8?
      • 1...Kb4
        • 2.Qc3#
      • 1...Ka6
        • 2.Qa8#
      • 1...b4!
  • Keys
    • 1.Qc6!
      • 1...Kb4
        • 2.Qc3#
      • 1...Ka6
        • 2.Qa8#
      • 1...b4
        • 2.Qa4#

This anticipates 204596(2011)

FEATURES

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