MESON Chess Problem Database

Problem Display
PID: 141576 (5b2/5B1b/1Bn1Np2/2pN3r/PPk2pRp/5Q2/3P4/6K1 w - - 0 1)

Visserman, Eeltje

2nd HM., Die Schwalbe, 1965/II

5b2/5B1b/1Bn1Np2/2pN3r/PPk2pRp/5Q2/3P4/6K1

#2

10 + 9

23 Die Schwalbe 1969

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qc3#
  • Tries
    • 1.Sdxf4?
      • threat
        • 2.Qc3#
      • 1...Kxb4
        • 2.Sd5#
      • 1...cxb4
        • 2.Sg5#
      • 1...Bd3!
    • 1.Sxc5?
      • threat
        • 2.Qc3#
      • 1...Kd4
        • 2.Qc3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Bxc5+!
    • 1.Sg5?
      • threat
        • 2.Qc3#
      • 1...Kd4
        • 2.Qc3#
      • 1...cxb4
        • 2.Sc3#
        • 2.Sxf4#
        • 2.Sxf6#
        • 2.Sc7#
        • 2.Se7#
      • 1...Bd3!
  • Keys
    • 1.Sexf4!
      • threat
        • 2.Qc3#
      • 1...Kd4
        • 2.Sg6#
      • 1...cxb4
        • 2.Se3#
      • 1...Bd3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(e);SBLOCK,XS(G)::QAR1(C)
  • Tries
    • Try
      • S(G);XP(b)
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT,XP(E)::R(F)+S(G),DCHECK
        • P(d);SBLOCK,XP(E)::B(J)+S(I)
      • Refutation
        • B(h);
    • Try
      • S(I);XP(d)
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
        • B(h);N_GUARD::QAB1(C),XB(h)
      • Refutation
        • B(i);CHECK,XS(I)
    • Try
      • S(I);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • B(h);
  • Actual
    • S(I);XP(b)
    • Threat
      • QAR1(C)
    • Vars
      • K(a);P-FLIGHT,P_SPINP(d)::R(F)+S(I)
      • P(d);SBLOCK,XP(E)::B(J)+S(G),DCHECK
      • B(h);N_GUARD::QAB1(C),XB(h)
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