MESON Chess Problem Database

Problem Display
PID: 40542 (3R2b1/7q/1N5p/2pp3Q/R2nk3/2pp4/K4Pr1/1BB4N w - - 0 1)

Wallis, Walter Warren

Recomm., BCF 028. Ty., 1938-1939

3R2b1/7q/1N5p/2pp3Q/R2nk3/2pp4/K4Pr1/1BB4N

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Qe2#
    • 1...Rg1
      • 2.f3#
    • 1...Rxf2+
      • 2.Sxf2#
    • 1...Rh2
      • 2.Sg3#
    • 1...Rg3
      • 2.Sxg3#
    • 1...Rg6
      • 2.f3#
    • 1...Rg7
      • 2.f3#
    • 1...c2
      • 2.f3#
  • Tries
    • 1.Re8+?
      • 1...Be6
        • 2.Rxe6#
        • 2.Qxd5#
      • 1...Qe7!
  • Keys
    • 1.Rxd5!
      • threat
        • 2.Qe2#
      • 1...Rxf2+
        • 2.Sxf2#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Rg4
        • 2.Qxg4#
      • 1...Rg3
        • 2.Sxg3#
      • 1...c2
        • 2.f3#
      • 1...c4
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(i);SBLOCK::QAR2(G)
    • R(a);N_PINP(E)::P(E)
    • R(a);CHECK,XP(E)::S(C),XR(a)
    • R(a);N_GUARD::S(C)
    • R(a);N_GUARD,N_PINP(E)::S(C),XR(a)
    • P(b);N_PINP(E),N_SPINP(c)::P(E)
  • Tries
    • Try
      • R(I);CHECK
      • Refutation
        • Q(i);P_SPINQ(i)
  • Actual
    • R(I);P_SPINR(I),XP(g)
    • Threat
      • QAR2(G)
    • Vars
      • R(a);CHECK,XP(E)::S(C),XR(a)
      • B(j);CHECK,OGATE,XR(I)::QAB1(G),XB(j)
      • R(a);N_GUARD,N_PINP(E)::QAR2(G),XR(a)
      • R(a);N_GUARD,N_PINP(E)::S(C),XR(a)
      • P(b);N_PINP(E),N_SPINP(c)::P(E)
      • P(f);N_PINR(I),N_SPINS(d)::R1(I)
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