MESON Chess Problem Database

Problem Display
PID: 157315 (8/p2Q4/1k6/1N6/3K4/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

200 Shakhmatni Zadachi, 1983

8/p2Q4/1k6/1N6/3K4/8/8/8

#2

3 + 2

15148 Sadier Collection 2016
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kc4?
      • 1...Ka5
        • 2.Qxa7#
      • 1...Ka6
        • 2.Qxa7#
      • 1...a6
        • 2.Qc7#
      • 1...a5!
    • 1.Sa3?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka6
        • 2.Qb5#
      • 1...a6
        • 2.Sc4#
      • 1...a5!
    • 1.Sxa7?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka6!
  • Keys
    • 1.Sd6!
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka6
        • 2.Qb5#
      • 1...a5
        • 2.Qb7#
      • 1...a6
        • 2.Sc4#

Anticipated by 23679(1928)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAR2(C),XP(b)
        • K(a);P-FLIGHT::QAR1(C),XP(b)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
        • K(a);P-FLIGHT::QAB1(C)
        • P(b);SBLOCK::S(B)
      • Refutation
        • P(b);
    • Try
      • S(B);XP(b)
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::QAB1(C)
      • P(b);SBLOCK::QAR1(C)
      • P(b);SBLOCK::S(B)
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