MESON Chess Problem Database

Problem Display
PID: 16360 (8/2p5/2K3N1/2N3p1/2pB2Pb/5k1B/5p2/5Q1n w - - 0 1)

Rudd, Charles Dember

Chess, 1940

8/2p5/2K3N1/2N3p1/2pB2Pb/5k1B/5p2/5Q1n

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kg3
      • 2.Qg2#
    • 1...Bg3
      • 2.Qd1#
    • 1...Sg3
      • 2.Qxf2#
    • 1...c3
      • 2.Qd3#
  • Tries
    • 1.Kb5?
      • 1...Kg3
        • 2.Qg2#
      • 1...Bg3
        • 2.Qd1#
      • 1...Sg3
        • 2.Qxf2#
      • 1...c3
        • 2.Qd3#
      • 1...c6+!
    • 1.Kd5?
      • 1...Kg3
        • 2.Qg2#
      • 1...Bg3
        • 2.Qd1#
      • 1...Sg3
        • 2.Qxf2#
      • 1...c3
        • 2.Qd3#
      • 1...c6+!
    • 1.Kb7?
      • 1...Kg3
        • 2.Qg2#
      • 1...Bg3
        • 2.Qd1#
      • 1...Sg3
        • 2.Qxf2#
      • 1...c3
        • 2.Qd3#
      • 1...c6!
    • 1.Kxc7?
      • 1...Kg3
        • 2.Qg2#
      • 1...Sg3
        • 2.Qxf2#
      • 1...c3
        • 2.Qd3#
      • 1...Bg3+!
    • 1.Kd7?
      • 1...Kg3
        • 2.Qg2#
      • 1...Bg3
        • 2.Qd1#
      • 1...Sg3
        • 2.Qxf2#
      • 1...c3
        • 2.Qd3#
      • 1...c6!
    • 1.Se4?
      • 1...Bg3
        • 2.Sd2#
        • 2.Sxg5#
      • 1...Sg3
        • 2.Sd2#
      • 1...c3
        • 2.Qd3#
      • 1...Kxe4!
    • 1.Se6?
      • 1...Kg3
        • 2.Qg2#
      • 1...Ke4
        • 2.Bg2#
        • 2.Qe2#
      • 1...Bg3
        • 2.Sxg5#
      • 1...c3
        • 2.Qd3#
      • 1...Sg3!
    • 1.Qxh1+?
      • 1...Kg3
        • 2.Se4#
        • 2.Be5#
        • 2.Qg2#
      • 1...Ke2!
  • Keys
    • 1.Sb3!
      • 1...Kg3
        • 2.Qg2#
      • 1...Ke4
        • 2.Bg2#
        • 2.Qe2#
      • 1...cxb3
        • 2.Qd3#
      • 1...Bg3
        • 2.Sd2#
      • 1...Sg3
        • 2.Sd2#
      • 1...c3
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINP(b),P-FLIGHT::QAR1(A)
    • B(e);SBLOCK::QAB(A)
    • S(a);N_GUARD,S_CUTB(e)::QAR1(A),XP(b)
    • P(d);N_GUARD::QAR2(A)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(A)
        • B(e);SBLOCK::QAB(A)
        • S(a);N_GUARD,S_CUTB(e)::QAR1(A),XP(b)
        • P(d);N_GUARD::QAR2(A)
      • Refutation
        • P(g);CHECK
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(A)
        • B(e);SBLOCK::QAB(A)
        • S(a);N_GUARD,S_CUTB(e)::QAR1(A),XP(b)
        • P(d);N_GUARD::QAR2(A)
      • Refutation
        • P(g);CHECK
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(A)
        • B(e);SBLOCK::QAB(A)
        • S(a);N_GUARD,S_CUTB(e)::QAR1(A),XP(b)
        • P(d);N_GUARD::QAR2(A)
      • Refutation
        • P(g);
    • Try
      • K(F);P-FLIGHT,XP(g)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(A)
        • S(a);N_GUARD,S_CUTB(e)::QAR1(A),XP(b)
        • P(d);N_GUARD::QAR2(A)
      • Refutation
        • B(e);CHECK
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(A)
        • B(e);SBLOCK::QAB(A)
        • S(a);N_GUARD,S_CUTB(e)::QAR1(A),XP(b)
        • P(d);N_GUARD::QAR2(A)
      • Refutation
        • P(g);
    • Try
      • S(E);
      • Vars
        • S(a);SBLOCK::S(E)
        • P(d);N_GUARD::QAR2(A)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XS(E)
    • Try
      • S(E);
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(A)
        • B(e);N_GUARD,SBLOCK::S(E),XP(f)
        • P(d);N_GUARD::QAR2(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK,N_PINP(b),XS(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(E);
    • Vars
      • K(c);N_SPINP(b),P-FLIGHT::QAR1(A)
      • P(d);N_GUARD,XS(E)::QAR2(A)
      • B(e);SBLOCK::S(E)
      • S(a);SBLOCK::S(E)
      • P(d);N_GUARD::QAR2(A)
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