MESON Chess Problem Database

Problem Display
PID: 287357 (2N5/7r/3N1p2/1R1qkB2/2b1P1p1/3pP2p/1n1K1P1p/5Q2 w - - 0 1)

Ersek, Tibor

Uralski Problemist, 2005

2N5/7r/3N1p2/1R1qkB2/2b1P1p1/3pP2p/1n1K1P1p/5Q2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Sf7#
    • 1...Rh5
      • 2.Sf7#
    • 1...Rh6
      • 2.Sf7#
    • 1...Rf7
      • 2.Sxf7#
    • 1...Rh8
      • 2.Sf7#
    • 1...Sd1
      • 2.Sxc4#
    • 1...Sa4
      • 2.Sxc4#
    • 1...g3
      • 2.f4#
  • Tries
    • 1.Qxh3?
      • threat
        • 2.Qg3#
      • 1...Rxh3
        • 2.Sf7#
      • 1...gxh3
        • 2.f4#
      • 1...g3
        • 2.Qxg3#
        • 2.f4#
      • 1...h1S!
    • 1.Qc1?
      • threat
        • 2.Qxb2#
        • 2.Qc3#
      • 1...Qxb5
        • 2.Qc3#
      • 1...Sd1
        • 2.Sxc4#
      • 1...Sa4
        • 2.Sxc4#
      • 1...Bxb5!
  • Keys
    • 1.Qxd3!
      • threat
        • 2.Qd4#
      • 1...Bxd3
        • 2.Rxd5#
      • 1...Bxb5
        • 2.Qxd5#
      • 1...Sxd3
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(j);N_GUARD::S(H)
    • R(j);N_GUARD::S(H),XR(j)
    • S(a);N_GUARD::S(H),XB(e)
    • P(f);N_GUARD::P(C)
  • Tries
    • Try
      • Q(A);XP(d)
      • Threat
        • QAB(A)
      • Vars
        • R(j);N_GUARD,XQ(A)::S(H)
        • P(f);N_GUARD,XQ(A)::P(C)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);N_SPINQ(g),XR(F)::QAB(A)
        • S(a);N_GUARD::S(H),XB(e)
      • Refutation
        • B(e);N_SPINQ(g),XR(F)
  • Actual
    • Q(A);P_SPINQ(A),XP(c)
    • Threat
      • QAB1(A)
    • Vars
      • B(e);N_GUARD,XQ(A)::R1(F),XQ(g)
      • B(e);N_GUARD,N_SPINQ(g),XR(F)::QAR1(A),XQ(g)
      • S(a);N_GUARD,XQ(A)::S(H),XB(e)
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