MESON Chess Problem Database

Problem Display
PID: 10034 (7B/8/8/2p4R/3p3Q/3k1N2/1R6/K7 w - - 0 1)

Buchwald, Julius

4th Prize, Problem (Zagreb), 1961

7B/8/8/2p4R/3p3Q/3k1N2/1R6/K7

#2

6 + 3

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qxd4#
  • Tries
    • 1.Se1+?
      • 1...Kc3
        • 2.Rxc5#
      • 1...Ke3
        • 2.Re5#
      • 1...Kc4!
    • 1.Se5+?
      • 1...Kc3
        • 2.Qe1#
      • 1...Ke3!
    • 1.Bxd4?
      • threat
        • 2.Se5#
      • 1...cxd4
        • 2.Qxd4#
      • 1...Kc4!
    • 1.Rb3+?
      • 1...Ke2
        • 2.Qe1#
      • 1...Kc4
        • 2.Sd2#
      • 1...Kc2!
    • 1.Qf2?
      • 1...Kc3
        • 2.Qc2#
      • 1...Kc4
        • 2.Qc2#
      • 1...c4
        • 2.Qxd4#
      • 1...Ke4!
    • 1.Qe4+?
      • 1...Kc3
        • 2.Rxc5#
        • 2.Qc2#
      • 1...Kc4
        • 2.Qc2#
      • 1...Kxe4!
  • Keys
    • 1.Qg3!
      • 1...Kc3
        • 2.Sd2#
      • 1...Ke3
        • 2.Sg5#
      • 1...Kc4
        • 2.Sd2#
      • 1...Ke4
        • 2.Sd2#
      • 1...c4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAR1(D),XP(b)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::R(E),XP(c)
        • K(a);P-FLIGHT::R(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(F);XP(b)
      • Threat
        • S(C)
      • Vars
        • P(c);OGATE,XB(F)::QAR1(D),XP(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
        • K(a);P_SPINP(b),S_FLIGHT::S(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR1(D)
        • K(a);S_FLIGHT::QAR2(D)
        • P(c);N_GUARD::QAR1(D),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,P_SPINP(b),S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::QAR(D)+S(C)
      • K(a);P-FLIGHT::QAR(D)+S(C)
      • K(a);S_FLIGHT::S(C)
      • P(c);SBLOCK::QAR(D)+S(C)
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