MESON Chess Problem Database

Problem Display
PID: 237742 (7K/2p1p1R1/b2b3p/2QNPk1r/r3p2P/5N1P/pBB1P3/q4R2 w - - 0 1)

Ellerman, Arnoldo

Arbejder-Skak, 1951

7K/2p1p1R1/b2b3p/2QNPk1r/r3p2P/5N1P/pBB1P3/q4R2

#2

12 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe5
      • 2.Sd4#
    • 1...e6
      • 2.Se1#
  • Tries
    • 1.Se3+?
      • 1...Kf4
        • 2.Se1#
        • 2.Rg4#
      • 1...Ke6!
    • 1.Sxe7+?
      • 1...Kf4
        • 2.Se1#
        • 2.Rg4#
        • 2.e3#
      • 1...Bxe7
        • 2.Sd4#
      • 1...Ke6!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Rf7#
      • 1...Kxf4
        • 2.Se1#
      • 1...Bxe5
        • 2.Qxe5#
      • 1...Bc4
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(h);P_PINR(K),SBLOCK,XP(J)::R(A)+S(E),DCHECK
    • P(k);SBLOCK::R(A)+S(E)
  • Tries
    • Try
      • S(I);CHECK
      • Refutation
        • K(e);N_SPINP(d),S_FLIGHT
    • Try
      • S(I);CHECK,XP(k)
      • Vars
        • B(h);XS(I)::R(A)+S(E),DCHECK
      • Refutation
        • K(e);N_SPINP(d),S_FLIGHT
  • Actual
    • S(I);
    • Threat
      • R(K)
    • Vars
      • K(e);N_SPINP(d),P-FLIGHT,XS(I)::R(A)+S(E)
      • B(h);OGATE,P_PINR(K),P_SPINB(h),XP(J)::QAR1(H),XB(h)
      • B(g);S_CUTR(c)::S(E)
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