MESON Chess Problem Database

Problem Display
PID: 272995 (4R1B1/3K1np1/6P1/1R1NP3/1P2k1Nn/1rp1P3/6P1/1b3Q2 w - - 0 1)

de Haas, Bastian Evert

Schakend Nederland, 1977

4R1B1/3K1np1/6P1/1R1NP3/1P2k1Nn/1rp1P3/6P1/1b3Q2

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Sxc3#
    • 1...Rxb4
      • 2.Sxc3#
    • 1...Bd3
      • 2.Qf4#
    • 1...Sf5
      • 2.Sf2#
    • 1...Sxe5+
      • 2.Rxe5#
    • 1...Sd6
      • 2.exd6#
  • Tries
    • 1.Qf5+?
      • 1...Sxf5
        • 2.Sf2#
      • 1...Kxf5!
  • Keys
    • 1.Se7!
      • threat
        • 2.Qc4#
      • 1...Sxe5+
        • 2.Rxe5#
      • 1...Rxb4
        • 2.Rxb4#
      • 1...Sxg2
        • 2.Qf5#
      • 1...Bd3
        • 2.Qf4#
      • 1...Sf3
        • 2.gxf3#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sd6
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::S(G),XP(c)
    • R(b);N_GUARD,XP(D)::S(G),XP(c)
    • B(a);SBLOCK::QAR1(A)
    • S(e);SBLOCK::S(E)
    • S(f);CHECK,OGATE,P_SPINS(f),XP(H)::R1(K),XS(f)
    • S(f);OGATE::R(K)+P(H),XS(f)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);SBLOCK,XQ(A)::S(E)
      • Refutation
        • K(d);S_FLIGHT,XQ(A)
  • Actual
    • S(G);
    • Threat
      • QAR2(A)
    • Vars
      • S(f);CHECK,OGATE,XP(H)::R1(F),XS(f)
      • R(b);OGATE,XP(D)::R(F),XR(b)
      • S(e);N_GUARD,XP(B)::QAB1(A)
      • B(a);SBLOCK::QAR1(A)
      • S(e);OGATE::P(B),XS(e)
      • S(e);N_GUARD::QAB1(A),XS(e)
      • S(f);OGATE::B(L)
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Developed and maintained by Brian Stephenson.
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