MESON Chess Problem Database

Problem Display
PID: 96646 (5K2/4P1N1/1p3NQ1/6R1/2pk2p1/2R2b2/3Prrp1/1q4Bn w - - 0 1)

Racz, Erich

Problemas, 1976

5K2/4P1N1/1p3NQ1/6R1/2pk2p1/2R2b2/3Prrp1/1q4Bn

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Rd5#
    • 1...Re6
      • 2.Sxe6#
    • 1...Be4
      • 2.Se6#
    • 1...Bd5
      • 2.Rxd5#
  • Tries
    • 1.Bxf2+?
      • 1...Rxf2
        • 2.Se6#
      • 1...Re3
        • 2.Se6#
        • 2.Bxe3#
      • 1...Sxf2!
    • 1.Qe4+?
      • 1...Rxe4
        • 2.Rd5#
      • 1...Bxe4
        • 2.Se6#
      • 1...Qxe4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Se6#
      • 1...Bxe4+
        • 2.Qf6#
      • 1...Qxe4
        • 2.Qxb6#
      • 1...Rxe4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(c);S_CUTB(f)::R1(D)
    • R(c);N_GUARD::S(H),XR(c)
    • B(f);P_PINS(E),S_CUTR(c)::S(H)
    • B(f);N_GUARD,P_PINS(E)::R1(D),XB(f)
  • Tries
    • Try
      • B(A);CHECK,XR(d)
      • Vars
        • R(c);XB(A)::S(H)
      • Refutation
        • S(b);XB(A)
    • Try
      • Q(F);CHECK
      • Vars
        • R(c);XQ(F)::R1(D)
        • B(f);P_PINS(E),XQ(F)::S(H)
      • Refutation
        • Q(a);XQ(F)
  • Actual
    • S(E);
    • Threat
      • S(H)
    • Vars
      • B(f);CHECK,SBLOCK,XS(E)::QAB(F)
      • Q(a);N_GUARD,SBLOCK,XS(E)::QAB(F),XP(j)
      • R(c);SBLOCK,XS(E)::QAR2(F)
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