MESON Chess Problem Database

Problem Display
PID: 37516 (7B/1K1Q4/3P4/1ppkPp2/3PN3/N1R2nPb/3n4/1B3q2 w - - 0 1)

Strerath, Otto

1st Prize, Tidskrift for Schack, 1955

7B/1K1Q4/3P4/1ppkPp2/3PN3/N1R2nPb/3n4/1B3q2

#2

11 + 8

3105 FIDE Album (1945-1955) 1964
133 The Problemist Supplement 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd4
      • 2.Rxc5#
    • 1...cxd4
      • 2.Rc5#
      • 2.Qf7#
  • Tries
    • 1.Sxb5?
      • threat
        • 2.Sf6#
        • 2.Rxc5#
        • 2.Qf7#
      • 1...Qxb1
        • 2.Sf6#
      • 1...Sxb1
        • 2.Sf6#
      • 1...Sxe4
        • 2.Qf7#
      • 1...Sxd4
        • 2.Sc7#
        • 2.Rxc5#
      • 1...Sxe5
        • 2.Sf6#
        • 2.Rxc5#
      • 1...cxd4
        • 2.Sc7#
        • 2.Rc5#
        • 2.Qf7#
      • 1...fxe4
        • 2.Rxc5#
      • 1...Qd3
        • 2.Sf6#
      • 1...Qc4
        • 2.Sf6#
        • 2.Qf7#
      • 1...Qc1
        • 2.Sf6#
        • 2.Qf7#
      • 1...Sb3
        • 2.Sf6#
        • 2.Qf7#
      • 1...Sc4
        • 2.Sf6#
        • 2.Qf7#
      • 1...Sg5
        • 2.Sf6#
        • 2.Rxc5#
      • 1...c4
        • 2.Sf6#
        • 2.Qf7#
      • 1...f4
        • 2.Sf6#
        • 2.Rxc5#
      • 1...Qxb5+!
    • 1.Qc6+?
      • 1...Kxd4
        • 2.Sc2#
        • 2.Qxc5#
      • 1...Ke6!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sf6#
      • 1...Kxe4
        • 2.Qc6#
      • 1...Sxe4
        • 2.Qf7#
      • 1...Sxd4
        • 2.Se3#
      • 1...cxd4
        • 2.Sb4#
      • 1...fxe4
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK,XP(E)::R1(C),XP(f)
  • Tries
    • Try
      • S(B);XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);P_PINS(B),XB(A)::S(F)
        • S(b);XB(A)::S(F)
        • S(b);XS(F)::QAB(J)
        • P(h);XS(F)::R1(C),XP(f)
        • Q(a);::S(F)
      • Refutation
        • Q(a);CHECK,XS(B)
    • Try
      • Q(J);CHECK
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • S(F)
    • Vars
      • K(g);S_FLIGHT,XS(F)::QAB(J)
      • S(b);SBLOCK,XS(F)::QAB(J)
      • S(c);SBLOCK,XP(E)::S(B)
      • P(f);N_GUARD,SBLOCK,XP(E)::S(B)
      • P(h);SBLOCK,XS(F)::R1(C),XP(f)
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