MESON Chess Problem Database

Problem Display
PID: 105468 (1K6/8/k7/8/1Q6/8/rN6/8 w - - 0 1)

Pypa, Volodimir Iosifovich

Mat, 1991

1K6/8/k7/8/1Q6/8/rN6/8

#2

3 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qb7#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sc5#
      • 1...Ra5
        • 2.Qb7#
      • 1...Rc2!
    • 1.Sa4?
      • threat
        • 2.Sc5#
        • 2.Qb6#
      • 1...Rb2
        • 2.Sc5#
      • 1...Rc2
        • 2.Qb6#
      • 1...Rxa4!
  • Keys
    • 1.Kc7!
      • threat
        • 2.Qb6#
      • 1...Ka7
        • 2.Qb7#
      • 1...Rxb2
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK::QAB1(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • R(a);SBLOCK::QAB1(B)
      • Refutation
        • R(a);
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);P_PINQ(B)::S(A)
        • R(a);::QAR1(B)
      • Refutation
        • R(a);XS(A)
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • QAR1(B)
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • R(a);N_GUARD,XS(A)::QAR2(B)
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