MESON Chess Problem Database

Problem Display
PID: 180254 (k1N5/1nP5/1P6/p1P4R/P2K4/8/6Q1/8 w - - 0 1)

Lider, Valentin Viktorovich

Die Schwalbe, 1971

k1N5/1nP5/1P6/p1P4R/P2K4/8/6Q1/8

#2

8 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kd5?
      • 1...Sxc5
        • 2.Kxc5#
      • 1...Sd6
        • 2.Kxd6#
      • 1...Sd8!
    • 1.Qg8?
      • 1...Sxc5
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sd8!
    • 1.c6?
      • threat
        • 2.cxb7#
      • 1...Sd6
        • 2.Rxa5#
      • 1...Sd8
        • 2.Rxa5#
      • 1...Sc5!
  • Keys
    • 1.Rd5!
      • 1...Sxc5
        • 2.Rxc5#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sd8
        • 2.Rxd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);N_PINS(b),P-FLIGHT
      • Vars
        • S(b);XP(D)::QAB(A)+K(C),XS(b)
        • S(b);::QAB(A)+K(C),XS(b)
      • Refutation
        • S(b);
    • Try
      • Q(A);N_PINS(b)
      • Vars
        • S(b);N_GUARD,XP(D)::QAR(A)+S(H)
        • S(b);N_GUARD::QAR(A)+S(H),XS(b)
      • Refutation
        • S(b);
    • Try
      • P(D);N_PINS(b)
      • Threat
        • P(D),XS(b)
      • Vars
        • S(b);N_GUARD::R(E),XP(a)
      • Refutation
        • S(b);
  • Actual
    • R(E);N_PINS(b)
    • Vars
      • S(b);OGATE,XP(D)::QAB(A)+R(E),XS(b)
      • S(b);OGATEB::QAB(A)+R(E),XS(b)
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Developed and maintained by Brian Stephenson.
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