MESON Chess Problem Database

Problem Display
PID: 257909 (7B/2n4n/1R6/R2q1k2/3PN1pP/3P1NP1/Bp2Q2P/1bb4K w - - 0 1)

Zilahi, Zoltan

British Chess Magazine, 1934

7B/2n4n/1R6/R2q1k2/3PN1pP/3P1NP1/Bp2Q2P/1bb4K

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Rxe5#
    • 1...Sa6
      • 2.Rxd5#
    • 1...Sa8
      • 2.Rxd5#
    • 1...Se8
      • 2.Rxd5#
    • 1...Sg5
      • 2.Rf6#
    • 1...Sf6
      • 2.Rxf6#
    • 1...Sf8
      • 2.Rf6#
  • Tries
    • 1.Sed2?
      • threat
        • 2.Qe4#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Sg5
        • 2.Rf6#
      • 1...Sb5!
    • 1.h5?
      • threat
        • 2.Sh4#
        • 2.Sd6#
      • 1...Sb5
        • 2.Sh4#
      • 1...Be3
        • 2.Sh4#
      • 1...Bf4
        • 2.Sh4#
      • 1...Bg5
        • 2.Sd6#
      • 1...Se8
        • 2.Sh4#
        • 2.Rxd5#
      • 1...gxf3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxg4#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Qxe5
        • 2.Rxe5#
      • 1...Qg8
        • 2.Sd6#
      • 1...Sf6
        • 2.Rxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(e);OGATE::R1(K),XQ(e)
    • S(g);N_GUARD::R(K),XQ(e)
    • S(h);N_GUARD::R1(L)
    • S(h);N_GUARD::R1(L),XS(h)
  • Tries
    • Try
      • S(I);P_SPINS(F)
      • Threat
        • QAB1(C)
      • Vars
        • B(a);OGATE,XP(E)::QAB(C),XB(a)
        • S(h);N_GUARD::R1(L),XS(h)
        • S(h);N_GUARD::R1(L)
      • Refutation
        • S(g);N_SPINQ(e)
    • Try
      • P(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);N_SPINQ(e)::S(F)
        • B(b);::S(F)
        • B(b);::S(I)
      • Refutation
        • P(d);XS(F)
  • Actual
    • S(F);N_PINQ(e),P_SPINS(I)
    • Threat
      • QAB1(C),XP(d)
    • Vars
      • Q(e);CHECK,OGATE,XS(I)::QAB1(C),XQ(e)
      • Q(e);N_PINS(I),OGATE,P_SPINQ(e),XS(F)::R1(K),XQ(e)
      • Q(e);N_PINS(I)::S(I)
      • S(h);N_GUARD::R1(L),XS(h)
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