MESON Chess Problem Database

Problem Display
PID: 87534 (2n3BB/p7/R5P1/K3p1r1/pP1k3N/r1pP1pp1/p1QP3b/2N4b w - - 0 1)

Halatz, AL

The Problemist, 1930

2n3BB/p7/R5P1/K3p1r1/pP1k3N/r1pP1pp1/p1QP3b/2N4b

#2

11 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Sf5#
    • 1...Rf5
      • 2.Sxf5#
    • 1...Rxg6
      • 2.Sf5#
    • 1...Sd6
      • 2.Rxd6#
    • 1...cxd2
      • 2.Qc5#
    • 1...f2
      • 2.Se2#
    • 1...g2
      • 2.Sxf3#
  • Tries
    • 1.Rc6?
      • threat
        • 2.Rc4#
      • 1...cxd2
        • 2.Qc5#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sb6!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Rf4#
      • 1...e4+
        • 2.Rf5#
      • 1...cxd2
        • 2.Qc5#
      • 1...Rg4
        • 2.Sf5#
      • 1...Rf5
        • 2.Sxf5#
      • 1...Sd6
        • 2.Rxd6#
      • 1...f2
        • 2.Se2#
      • 1...g2
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(k);N_GUARD::S(F)
    • R(k);N_GUARD::S(F),XR(k)
    • R(k);N_GUARD,XP(I)::S(F)
    • S(m);N_GUARD::R(H),XS(m)
    • P(e);OGATE,XP(C)::QAB1(B)
    • P(f);N_GUARD::S(A)
    • P(g);S_CUTB(a)::S(F),XP(f)
  • Tries
    • Try
      • R(H);
      • Threat
        • R1(H)
      • Vars
        • P(e);OGATE,XP(C)::QAB1(B)
        • S(m);N_GUARD::R(H),XS(m)
      • Refutation
        • S(m);
  • Actual
    • R(H);N_PINP(j)
    • Threat
      • R(H)
    • Vars
      • P(j);CHECK,OGATEB::B(K)+R(H)
      • P(e);OGATE,XP(C)::QAB1(B)
      • R(k);N_GUARD::S(F)
      • R(k);N_GUARD::S(F),XR(k)
      • S(m);N_GUARD::R(H),XS(m)
      • P(f);N_GUARD::S(A)
      • P(g);S_CUTB(a)::S(F),XP(f)
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