MESON Chess Problem Database

Problem Display
PID: 18681 (1B1n1r2/2R2r2/3Np2Q/RN1pkP1P/6p1/4p1K1/2q1P3/8 w - - 0 1)

Visserman, Eeltje

3rd Prize, Problem 018. TT, 1957

1B1n1r2/2R2r2/3Np2Q/RN1pkP1P/6p1/4p1K1/2q1P3/8

#2

10 + 9

3976 FIDE Album (1956-1958) 1961

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Qf4#
    • 1...Sc6
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qxe6#
  • Tries
    • 1.Sxf7+?
      • 1...Ke4
        • 2.Qf4#
      • 1...Kxf5
        • 2.Sbd6#
        • 2.Qf4#
        • 2.Qg6#
      • 1...Sxf7
        • 2.Qxe6#
      • 1...Rxf7!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qf4#
      • 1...Kxe4
        • 2.Qf4#
      • 1...Kxf5
        • 2.Qf4#
      • 1...Qxe4
        • 2.Rxf7#
      • 1...Rxf5
        • 2.Rc4#
      • 1...dxe4
        • 2.Rc5#
      • 1...exf5
        • 2.Re7#
      • 1...d4
        • 2.Sbc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • R(g);SBLOCK::QAB1(H)
    • S(h);N_GUARD::QAR1(H),XP(f)
  • Tries
    • Try
      • S(G);CHECK,XR(g)
      • Vars
        • K(e);P-FLIGHT::QAR1(H)
        • S(h);XS(G)::QAR1(H),XP(f)
      • Refutation
        • R(i);XS(G)
  • Actual
    • S(G);
    • Threat
      • QAB1(H)
    • Vars
      • K(e);P-FLIGHT,XS(G)::QAR1(H)
      • K(e);P-FLIGHT,XP(E)::QAR1(H)
      • Q(a);N_GUARD,SBLOCK,XS(G)::B(J)+R(I),XR(g)
      • R(g);N_GUARD,SBLOCK,XP(E)::B(J)+R(I)
      • P(d);SBLOCK,XS(G)::B(J)+R(I),DCHECK
      • P(f);SBLOCK,XP(E)::B(J)+R(I),DCHECK
      • P(d);SBLOCK::R(C)+S(D)
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