MESON Chess Problem Database

Problem Display
PID: 151786 (1B1n2n1/ppr3p1/1RNkB3/1P2b1p1/1PbN4/6p1/3Q4/2KR4 w - - 0 1)

Albarda, Johannes

Die Schwalbe, 1955

1B1n2n1/ppr3p1/1RNkB3/1P2b1p1/1PbN4/6p1/3Q4/2KR4

#2

10 + 11

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe6
      • 2.Sf5#
    • 1...Sxe6
      • 2.Sf5#
  • Tries
    • 1.Sxa7+?
      • 1...Sc6
        • 2.Sc8#
      • 1...Ke7!
    • 1.Se7+?
      • 1...Sc6
        • 2.Sef5#
        • 2.Sc8#
      • 1...axb6
        • 2.Sef5#
        • 2.Sc8#
      • 1...Kxe7!
    • 1.Sxd8+?
      • 1...axb6
        • 2.Sf5#
      • 1...Ke7!
    • 1.Bxc4?
      • threat
        • 2.Sf5#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Kd7!
  • Keys
    • 1.Qxg5!
      • threat
        • 2.Qxd8#
        • 2.Qxe5#
      • 1...Bf4+
        • 2.Qxf4#
      • 1...Bxe6
        • 2.Sf5#
      • 1...Bxd4
        • 2.Qe5#
      • 1...Sxc6
        • 2.Qd8#
      • 1...Sxe6
        • 2.Sf5#
      • 1...bxc6
        • 2.Qxd8#
      • 1...Bf6
        • 2.Qc5#
      • 1...Sf7
        • 2.Sxa7#
      • 1...Sf6
        • 2.Qxe5#
      • 1...Se7
        • 2.Qxe7#
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(b);P_PINS(H),SBLOCK,XB(I)::QAR(C)+S(E),DCHECK
    • S(j);SBLOCK,XB(I)::QAR(C)+S(E),DCHECK
  • Tries
    • Try
      • S(H);CHECK,XP(f)
      • Vars
        • S(j);P_SPINS(j)::S(H)
      • Refutation
        • K(e);N_SPINR(h),S_FLIGHT
    • Try
      • S(H);CHECK
      • Refutation
        • K(e);N_SPINR(h),S_FLIGHT,XS(H)
    • Try
      • S(H);CHECK,XS(j)
      • Vars
        • P(f);XR(G)::QAR(C)+S(E),DCHECK
      • Refutation
        • K(e);N_SPINR(h),S_FLIGHT
    • Try
      • B(I);XB(b)
      • Threat
        • QAR(C)+S(E),DCHECK
      • Vars
        • B(c);OGATE,P_SPINB(c),XS(E)::QAR2(C),XB(c)
      • Refutation
        • K(e);N_SPINR(h),P-FLIGHT
  • Actual
    • Q(C);XP(d)
    • Threat
      • DUALS(2)
    • Vars
      • B(c);CHECK,OGATEB::QAB(C),XB(c)
      • B(b);P_PINS(H),SBLOCK,XB(I)::R(B)+S(E),DCHECK
      • B(c);P_SPINB(c),XS(E)::QAB1(C)
      • S(j);P_SPINS(j),XS(H)::QAR2(C)
      • S(j);SBLOCK,XB(I)::R(B)+S(E),DCHECK
      • P(g);P_SPINP(g),XS(H)::QAR2(C),XS(j)
      • B(c);OGATE::QAB1(C)
      • S(j);N_GUARD::R(G)+S(H),XP(f)
      • S(k);::QAB1(C),XB(c)
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