MESON Chess Problem Database

Problem Display
PID: 104550 (B2R4/6Q1/3N4/1PPrNP2/2pk4/8/8/3KB3 w - - 0 1)

Reiprich, Gejza

Praca, 1950

B2R4/6Q1/3N4/1PPrNP2/2pk4/8/8/3KB3

#2

10 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Bf2#
  • Tries
    • 1.Kc2?
      • threat
        • 2.Bf2#
      • 1...Kxc5
        • 2.Qa7#
      • 1...Ke3!
    • 1.Sg4+?
      • 1...Kd3
        • 2.Qc3#
      • 1...Re5
        • 2.Se4#
      • 1...Kxc5+!
    • 1.Sdxc4?
      • 1...Kxc5+
        • 2.Rxd5#
      • 1...Rxd8
        • 2.Qg1#
      • 1...Rd6
        • 2.Qg1#
      • 1...Rd7
        • 2.Qg1#
      • 1...Ke4+!
  • Keys
    • 1.Ke2!
      • 1...Rxe5+
        • 2.Se4#
      • 1...Kxc5
        • 2.Qa7#
      • 1...Rxc5
        • 2.Sf3#
      • 1...Rxd6
        • 2.Sd3#
      • 1...c3
        • 2.Bf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);SBLOCK::B(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • B(B)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(H)
        • R(c);P_SPINR(c)::R(J)+S(G)
      • Refutation
        • K(b);CHECK,S_FLIGHT,XP(D)
    • Try
      • S(G);P_PINR(c),XP(a)
      • Vars
        • K(b);CHECK,N_SPINR(c),S_FLIGHT,XP(D)::R1(J),XR(c)
        • R(c);N_SPINR(c),XR(J)::QAB(H)
        • R(c);::QAB(H)
      • Refutation
        • K(b);CHECK,P-FLIGHT
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • R(c);CHECK,P_SPINR(c),XS(E)::R(J)+S(G)
      • K(b);OGATEB,S_FLIGHT,XP(D)::QAB(H)
      • R(c);SBLOCK,XP(D)::QAB(H)+S(E),DCHECK
      • R(c);N_GUARD,P_SPINR(c),XS(G)::QAB(H)+S(E)
      • P(a);SBLOCK::B(B)
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