MESON Chess Problem Database

Problem Display
PID: 176463 (4K1Q1/4pN2/1pp1k2P/R1r5/4Pn1n/5P2/1BR5/1B6 w - - 0 1)

Istokovics, Ferenc

Schach-Echo, 1981

4K1Q1/4pN2/1pp1k2P/R1r5/4Pn1n/5P2/1BR5/1B6

#2

10 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa5
      • 2.Rxc6#
    • 1...Rb5
      • 2.Rxc6#
    • 1...Re5
      • 2.Rxc6#
    • 1...Rf5
      • 2.Rxc6#
    • 1...Rg5
      • 2.Rxc6#
    • 1...Rh5
      • 2.Rxc6#
  • Tries
    • 1.Se5+?
      • 1...Kf6
        • 2.Sg4#
        • 2.Sd7#
      • 1...Kd6!
    • 1.Rcxc5?
      • threat
        • 2.Rxc6#
      • 1...Sf5
        • 2.exf5#
      • 1...bxc5!
    • 1.Raxc5?
      • threat
        • 2.Rxc6#
      • 1...Sf5
        • 2.exf5#
      • 1...bxc5!
    • 1.Qg4+?
      • 1...Rf5
        • 2.Rxc6#
      • 1...Sf5!
  • Keys
    • 1.e5!
      • threat
        • 2.Sd6#
      • 1...Kd5
        • 2.Ba2#
      • 1...Kf5
        • 2.Qg4#
      • 1...Rxe5
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(c);OGATE,XR(F)::R(C),XP(e)
    • R(c);OGATE::R(C),XP(e)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • R(C);XR(c)
      • Threat
        • R(C),XP(e)
      • Vars
        • S(b);OGATE::P(E),XS(b)
      • Refutation
        • P(d);XR(C)
    • Try
      • R(F);XR(c)
      • Threat
        • R(F),XP(e)
      • Vars
        • S(b);OGATE::P(E),XS(b)
      • Refutation
        • P(d);XR(F)
    • Try
      • Q(J);CHECK
      • Vars
        • R(c);OGATE,P_SPINR(c)::R(C),XP(e)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • P(E);
    • Threat
      • QAB(J)+S(H)
    • Vars
      • K(f);P_SPINR(c),S_FLIGHT::B(A)
      • K(f);S_FLIGHT::QAB1(J)
      • R(c);OGATE,XP(E)::R(C),XP(e)
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