MESON Chess Problem Database

Problem Display
PID: 227931 (1q6/pP1R4/3Np1Q1/B2Nrp2/6R1/1B1kpp1p/3bp2K/4n3 w - - 0 1)

Lange, Hans Franz

Deutsche Schachzeitung, 1944

1q6/pP1R4/3Np1Q1/B2Nrp2/6R1/1B1kpp1p/3bp2K/4n3

#2

9 + 12

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Bc4#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sb4#
        • 2.Rd4#
      • 1...Re4+
        • 2.Sf4#
      • 1...exd5
        • 2.Rd4#
      • 1...Bc3
        • 2.Sb4#
      • 1...Bb4
        • 2.Sxb4#
        • 2.Rd4#
      • 1...Qd6
        • 2.Rd4#
      • 1...Sc2
        • 2.Sb4#
        • 2.Bc4#
      • 1...Rxd5+!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Rd4#
      • 1...Re4+
        • 2.Sf4#
      • 1...Rxd5+
        • 2.Sg3#
      • 1...Rxf5+
        • 2.Sc7#
      • 1...exf5
        • 2.Qa6#
      • 1...Bc3
        • 2.Sb4#
      • 1...Sc2
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::B(B)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);CHECK,N_SPINP(i),SBLOCK::R(I)+S(E),DCHECK
        • P(j);N_SPINP(i),P_SPINP(j),XS(E)::R1(C)
        • B(b);::R(I)+S(E),DCHECK
        • Q(l);::R1(C)
      • Refutation
        • R(h);CHECK,P_SPINR(h),XS(E)
  • Actual
    • S(F);XP(i)
    • Threat
      • R1(C)
    • Vars
      • R(h);CHECK,SBLOCK::R(I)+S(E),DCHECK
      • R(h);CHECK,N_GUARD,P_SPINR(h),XS(E)::QAB(G)+S(F)
      • R(h);CHECK,N_GUARD,P_SPINR(h),XS(F)::R(I)+S(E)
      • P(j);OGATE,P_SPINP(j),XS(F)::QAB(G)
      • B(b);SBLOCK::R(I)+S(E),DCHECK
      • S(a);SBLOCK::B(B)
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Developed and maintained by Brian Stephenson.
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