MESON Chess Problem Database

Problem Display
PID: 108709 (1b6/1Bn5/1r6/1RB5/1NkPp3/1p2Qp2/8/5K2 w - - 0 1)

Kroc, Henryk

Szachy, 1956

1b6/1Bn5/1r6/1RB5/1NkPp3/1p2Qp2/8/5K2

#2

7 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb5
      • 2.Qc1#
    • 1...Sxb5
      • 2.Bd5#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qxb3#
      • 1...Rxb5
        • 2.Qc3#
      • 1...Sxb5
        • 2.Sxb6#
      • 1...b2
        • 2.Qb3#
      • 1...Kxb5!
    • 1.Rxb6?
      • threat
        • 2.Qc1#
      • 1...Sb5
        • 2.Bd5#
      • 1...Sd5
        • 2.Bxd5#
        • 2.Ba6#
      • 1...b2!
    • 1.Qxb3+?
      • 1...Kxb5
        • 2.Sc6#
      • 1...Kxb3!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qxb3#
      • 1...Kxb5
        • 2.Qxb3#
      • 1...Kd5
        • 2.Qxb3#
      • 1...Rxb5
        • 2.Se5#
      • 1...Sxb5
        • 2.Sa5#
      • 1...b2
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK,XR(E)::QAR(B)
    • S(f);N_GUARD,SBLOCK,XR(E)::B(G)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(B),XP(a)
      • Vars
        • R(e);SBLOCK,XR(E)::QAR1(B)
        • S(f);SBLOCK,XR(E)::S(C),XR(e)
        • P(a);::QAB1(B)
      • Refutation
        • K(c);S_FLIGHT,XR(E)
    • Try
      • R(E);XR(e)
      • Threat
        • QAR(B)
      • Vars
        • S(f);N_GUARD::B(G)
      • Refutation
        • P(a);
    • Try
      • Q(B);CHECK,XP(a)
      • Vars
        • K(c);S_FLIGHT,XR(E)::QAR(B)+S(C)
      • Refutation
        • K(c);S_FLIGHT,XQ(B)
  • Actual
    • S(C);
    • Threat
      • QAB1(B),XP(a)
    • Vars
      • K(c);S_FLIGHT,XR(E)::QAR2(B),XP(a)
      • K(c);S_FLIGHT::QAB(B),XP(a)
      • R(e);SBLOCK,XR(E)::S(C)
      • S(f);SBLOCK,XR(E)::S(C)
      • P(a);::QAB1(B)
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