MESON Chess Problem Database

Problem Display
PID: 195747 (1nR5/2bR1bp1/1p1N1p1B/1P4Q1/1P1k1P2/PpN1p1K1/1rp1B1P1/2r5 w - - 0 1)

Cauveren, Jonas Ephraim

Haagsche Post, 1921

1nR5/2bR1bp1/1p1N1p1B/1P4Q1/1P1k1P2/PpN1p1K1/1rp1B1P1/2r5

#2

13 + 12

15601 Albrecht-Leiss-Degener Collection 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc3
      • 2.Se4#
    • 1...Bd8
      • 2.Sf5#
    • 1...fxg5
      • 2.Bxg7#
    • 1...f5
      • 2.Bxg7#
      • 2.Qxg7#
    • 1...gxh6
      • 2.Qxf6#
    • 1...g6
      • 2.Qxf6#
  • Tries
    • 1.Rcxc7?
      • threat
        • 2.Sf5#
      • 1...Bc4
        • 2.Rxc4#
      • 1...f5
        • 2.Sxf5#
        • 2.Bxg7#
        • 2.Qxg7#
      • 1...Sc6!
    • 1.Qd5+?
      • 1...Kxc3
        • 2.Se4#
        • 2.Qd3#
      • 1...Bxd5!
  • Keys
    • 1.f5!
      • threat
        • 2.Qxe3#
      • 1...Bxd6+
        • 2.Qf4#
      • 1...Kxc3
        • 2.Qxe3#
      • 1...Ke5
        • 2.Sxf7#
        • 2.Qxe3#
        • 2.Qf4#
      • 1...fxg5
        • 2.Bxg7#
      • 1...gxh6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(f);P_SPINB(i),S_FLIGHT,XS(D)::S(J)
    • B(i);::R(L)+S(J),DCHECK
    • P(h);OGATEB,XQ(I)::B(K),XP(k)
    • P(k);N_GUARD,XB(K)::QAB(I),XP(h)
    • P(k);N_GUARD::QAB(I),XP(h)
  • Tries
    • Try
      • R(M);XB(i)
      • Threat
        • R(L)+S(J),DCHECK
      • Vars
        • B(j);N_GUARD::R1(M),XB(j)
      • Refutation
        • S(l);
    • Try
      • Q(I);CHECK
      • Refutation
        • B(j);XQ(I)
  • Actual
    • P(G);P_SPINS(J)
    • Threat
      • QAB1(I),XP(e)
    • Vars
      • B(i);CHECK,P_SPINB(i),XS(J)::QAR2(I)
      • K(f);P_SPINB(i),S_FLIGHT,XS(D)::QAR2(I),XP(e)
      • P(h);OGATEB,XQ(I)::B(K),XP(k)
      • P(k);N_GUARD,XB(K)::QAB(I),XP(h)
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