MESON Chess Problem Database

Problem Display
PID: 140236 (4K3/3P1pp1/R1B1Pk1n/2p5/5P1N/8/3r4/1Q3b2 w - - 0 1)

Joseph, Fernand

3rd HM., 05. Kwik-Toernooi, 1975

4K3/3P1pp1/R1B1Pk1n/2p5/5P1N/8/3r4/1Q3b2

#2

8 + 7

102 Probleemblad 1975
15611 Schaak-composities 1975-1979 (de Vuyst) 1982

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sg8
      • 2.Qf5#
    • 1...fxe6
      • 2.Qg6#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Qe5#
      • 1...Re2
        • 2.d8Q#
        • 2.d8B#
      • 1...Sg4
        • 2.Qf5#
      • 1...Rd5!
    • 1.d8Q+?
      • 1...Kxe6
        • 2.Bd5#
        • 2.Qe4#
        • 2.Qe7#
      • 1...Rxd8+!
  • Keys
    • 1.exf7!
      • threat
        • 2.Qg6#
      • 1...Re2+
        • 2.Be4#
      • 1...Ke6
        • 2.Qg6#
      • 1...g6
        • 2.Qxg6#
      • 1...Rc2
        • 2.Bb5#
      • 1...Rg2
        • 2.Bb5#
      • 1...Rd3
        • 2.Bd5#
      • 1...Bd3
        • 2.Bb5#
      • 1...Sf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • S(e);N_GUARD::QAR1(A)
    • S(e);N_GUARD::QAR1(A),XS(e)
    • P(f);N_GUARD,SBLOCK,XP(F)::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(b);N_GUARD::P=Q
        • S(e);N_GUARD::QAR1(A)
      • Refutation
        • R(b);
    • Try
      • P(G);CHECK
      • Refutation
        • R(b);CHECK,XQ(G)
  • Actual
    • P(F);XP(f)
    • Threat
      • QAR1(A)
    • Vars
      • R(b);CHECK,N_GUARD,S_CUTB(a)::R(D)+B(E)
      • K(d);P-FLIGHT::QAR2(A)
      • P(g);::QAR1(A),XP(g)
      • R(b);N_GUARD::R(D)+B(E)
      • R(b);S_CUTB(a)::R(D)+B(E)
      • B(a);S_CUTR(b)::R(D)+B(E)
      • S(e);N_GUARD::QAR1(A),XS(e)
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