MESON Chess Problem Database

Problem Display
PID: 172241 (8/8/p7/3Q4/kN6/2Pp4/3K4/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kubanski krai, 1996

8/8/p7/3Q4/kN6/2Pp4/3K4/8

#2

4 + 3

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ka3
      • 2.Qa2#
  • Tries
    • 1.Kxd3?
      • 1...Ka3
        • 2.Qa2#
      • 1...a5!
    • 1.Sc2?
      • 1...a5
        • 2.Qc4#
      • 1...dxc2!
    • 1.Qa5+?
      • 1...Kb3
        • 2.Qa2#
      • 1...Kxa5!
  • Keys
    • 1.Qc4!
      • 1...Ka3
        • 2.Qa2#
      • 1...Ka5
        • 2.Qxa6#
      • 1...a5
        • 2.Sc2#

Anticipated by 23049(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(D)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • P(c);
    • Try
      • S(C);
      • Vars
        • P(c);SBLOCK::QAR2(D)
      • Refutation
        • P(a);XS(C)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(D)
      • Refutation
        • K(b);P-FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT::QAR1(D)
      • K(b);P-FLIGHT::QAR1(D),XP(c)
      • P(c);SBLOCK::QAR(D)+S(C)
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