MESON Chess Problem Database

Problem Display
PID: 98575 (BBr1R3/2NP4/4P1p1/K3k1q1/1P2P1r1/1PN1p3/4P3/Q2R4 w - - 0 1)

Pypa, Volodimir Iosifovich

Problem (Zagreb), 1967

BBr1R3/2NP4/4P1p1/K3k1q1/1P2P1r1/1PN1p3/4P3/Q2R4

#2

14 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4+
      • 2.S7d5#
    • 1...Kf6+
      • 2.S3d5#
    • 1...Qf4
      • 2.Sb1#
      • 2.Sa2#
      • 2.Sa4#
      • 2.S3b5#
    • 1...Rf4
      • 2.Sb1#
      • 2.Sa2#
      • 2.Sa4#
      • 2.S3b5#
  • Tries
    • 1.S3d5+?
      • 1...Kd6
        • 2.Sb5#
        • 2.dxc8S#
      • 1...Kxe4!
    • 1.S7d5+?
      • 1...Rc7
        • 2.Bxc7#
      • 1...Rxb8!
  • Keys
    • 1.Rf1!
      • threat
        • 2.S3b5#
      • 1...Kd4+
        • 2.S3b5#
      • 1...Kd6+
        • 2.S7b5#
      • 1...Rxe4
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(c);CHECK,S_FLIGHT::B(M)+S(J),DCHECK
    • K(c);CHECK,S_FLIGHT::QAB(A)+S(E),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(c);P-FLIGHT,P_PINS(E),XP(G)
    • Try
      • S(J);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::B(M),XR(f)
      • Refutation
        • R(f);XB(M)
  • Actual
    • R(B);
    • Threat
      • QAB(A)+S(E)
    • Vars
      • K(c);CHECK,S_FLIGHT::QAB(A)+S(E),DCHECK
      • K(c);CHECK,S_FLIGHT::B(M)+S(J),DCHECK
      • R(b);XP(G)::QAB(A)+S(E),XR(b)
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Developed and maintained by Brian Stephenson.
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