MESON Chess Problem Database

Problem Display
PID: 94639 (4n3/1N6/1N1p1pK1/1p3P2/1RppkPp1/6Q1/4PP2/8 w - - 0 1)

Woodward, LA

British Chess Magazine, 1953

4n3/1N6/1N1p1pK1/1p3P2/1RppkPp1/6Q1/4PP2/8

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc7
      • 2.Sxd6#
    • 1...Sg7
      • 2.Sxd6#
    • 1...c3
      • 2.Qe3#
    • 1...d3
      • 2.Qe3#
    • 1...d5
      • 2.Sc5#
  • Tries
    • 1.Rxb5?
      • 1...d3
        • 2.Qe3#
      • 1...Sc7
        • 2.Sxd6#
      • 1...Sg7
        • 2.Sxd6#
      • 1...d5
        • 2.Sc5#
      • 1...c3!
    • 1.Qd3+?
      • 1...Kxf4
        • 2.Qxd4#
      • 1...cxd3!
    • 1.f3+?
      • 1...gxf3
        • 2.Qxf3#
      • 1...Ke3!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qg2#
      • 1...Kxd5
        • 2.Qg2#
      • 1...d3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • S(h);N_GUARD::S(I),XP(f)
    • P(a);P_SPINP(b)::QAR1(C)
    • P(b);N_GUARD,P_SPINP(a)::QAR1(C)
    • P(f);N_GUARD::S(I)
  • Tries
    • Try
      • R(D);XP(e)
      • Vars
        • P(b);N_GUARD::QAR1(C)
        • S(h);N_GUARD::S(I),XP(f)
        • P(f);N_GUARD::S(I)
      • Refutation
        • P(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(E)::QAR2(C),XP(b)
      • Refutation
        • P(a);P_SPINP(b),XQ(C)
    • Try
      • P(B);CHECK
      • Vars
        • P(d);OGATE,XP(B)::QAB1(C),XP(d)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(G);
    • Threat
      • QAB(C)
    • Vars
      • K(c);S_FLIGHT,XS(G)::QAB(C)
      • P(b);P_SPINP(a)::QAB1(C),XP(b)
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