MESON Chess Problem Database

Problem Display
PID: 11664 (8/3p1R2/5Q2/3kp3/1P6/2K5/8/8 w - - 0 1)

Podushkin, S

Stella Polaris, 1970

8/3p1R2/5Q2/3kp3/1P6/2K5/8/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qf3#
    • 1...e4
      • 2.Rxd7#
  • Tries
    • 1.Re7?
      • threat
        • 2.Rxe5#
      • 1...Ke4
        • 2.Rxe5#
      • 1...e4
        • 2.Re5#
        • 2.Rxd7#
      • 1...d6!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kxd6!
    • 1.Qg6?
      • threat
        • 2.Rxd7#
      • 1...e4
        • 2.Rf5#
      • 1...d6!
  • Keys
    • 1.Qa6!
      • 1...Ke4
        • 2.Qd3#
      • 1...d6
        • 2.Qc4#
      • 1...e4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(C)
    • P(b);SBLOCK::R(D),XP(c)
  • Tries
    • Try
      • R(D);
      • Threat
        • R1(D),XP(b)
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::R1(D),XP(b)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Threat
        • R(D),XP(c)
      • Vars
        • P(b);OGATEB,SBLOCK::R(D)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • P(c);SBLOCK::QAB1(C)
      • P(b);OGATEB,SBLOCK::R(D)
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