MESON Chess Problem Database

Problem Display
PID: 17291 (5Rnq/3p3P/4NP2/4bkNQ/3PpP1K/2Bn2pP/2B5/1b3R2 w - - 0 1)

Buchwald, Julius

1st Prize, El Ajedrez Espanol, 1946

5Rnq/3p3P/4NP2/4bkNQ/3PpP1K/2Bn2pP/2B5/1b3R2

#2

13 + 9

14773 The Best American Chess Problems of 1946 1948
3105 FIDE Album (1945-1955) 1964
5759 Selected Compositions of Julius Buchwald 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf6
      • 2.Sg7#
    • 1...Qg7
      • 2.Sxg7#
    • 1...Qxh7
      • 2.Qxh7#
    • 1...Bxd4
      • 2.Sxd4#
    • 1...Sc1
      • 2.fxe5#
    • 1...Sb2
      • 2.fxe5#
    • 1...Sb4
      • 2.fxe5#
    • 1...Sc5
      • 2.fxe5#
    • 1...e3
      • 2.fxe5#
  • Tries
    • 1.Sxe4+?
      • 1...Kxe4
        • 2.Qxe5#
      • 1...Kxe6!
    • 1.dxe5?
      • threat
        • 2.Sd4#
      • 1...Sxf4
        • 2.Rxf4#
      • 1...dxe6
        • 2.Sf7#
      • 1...Sf2!
    • 1.fxe5+?
      • 1...Sf4
        • 2.Rxf4#
      • 1...Sf2!
  • Keys
    • 1.d5!
      • threat
        • 2.Sf3#
      • 1...Qxf6
        • 2.Sg7#
      • 1...Qxh7
        • 2.Sxh7#
        • 2.Qxh7#
      • 1...Bxf4
        • 2.Sf7#
      • 1...Bxf6
        • 2.Sd4#
      • 1...Sxf4
        • 2.Sxe4#
      • 1...dxe6
        • 2.Sxe6#
      • 1...Qg7
        • 2.Sxg7#
      • 1...e3
        • 2.fxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(i);N_GUARD,P_PINS(H),P_SPINQ(i),XP(K)::S(J)
    • Q(i);N_GUARD::S(J),XQ(i)
    • Q(i);OGATE,P_PINQ(I),XP(L)::QAB(I),XQ(i)
    • B(e);XP(E)::S(J),XB(e)
    • S(b);N_GUARD,P_SPINP(d)::R(A)+P(F),XB(e)
    • P(d);P_SPINS(b)::R(A)+P(F),XB(e)
  • Tries
    • Try
      • S(H);CHECK,XP(d)
      • Vars
        • K(f);OGATE,P_SPINS(b),S_FLIGHT,XS(H)::QAR1(I),XB(e)
      • Refutation
        • K(f);S_FLIGHT,XS(J)
    • Try
      • P(E);XB(e)
      • Threat
        • S(J)
      • Vars
        • S(b);OGATE,P_SPINP(d),P_SPINS(b),XP(F)::R1(A),XS(b)
        • P(g);SBLOCK,XS(J)::QAR(I)+S(H)
      • Refutation
        • S(b);P_SPINP(d)
    • Try
      • P(F);CHECK,XB(e)
      • Vars
        • S(b);N_GUARD,P_SPINP(d),P_SPINS(b)::R1(A),XS(b)
      • Refutation
        • S(b);P_SPINP(d),P_SPINS(b)
  • Actual
    • P(E);
    • Threat
      • QAR(I)+S(H)
    • Vars
      • Q(i);N_GUARD,P_PINS(H),P_SPINQ(i),XP(K)::S(J)
      • B(e);P_SPINB(e),XP(F)::QAR(I)+S(H)
      • B(e);N_GUARD,P_PINS(H),P_SPINB(e),XP(K)::S(J)
      • S(b);P_SPINP(d),P_SPINS(b),XP(F)::QAR(I)+S(H),XP(d)
      • P(g);XS(J)::QAR(I)+S(H),XP(g)
      • Q(i);N_GUARD::S(J),XQ(i)
      • P(d);P_SPINS(b)::R(A)+P(F),XB(e)
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