MESON Chess Problem Database

Problem Display
PID: 11030 (Kb5B/n2Np3/4r1p1/3N4/B1k5/3p4/6Q1/2n5 w - - 0 1)

Cox, C

Chess, 1936

Kb5B/n2Np3/4r1p1/3N4/B1k5/3p4/6Q1/2n5

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qxe4#
    • 1...Ra6
      • 2.Qe4#
    • 1...Rb6
      • 2.Qe4#
    • 1...Rc6
      • 2.Qe4#
    • 1...Rd6
      • 2.Qe4#
    • 1...Rf6
      • 2.Qe4#
    • 1...Sa2
      • 2.Qxa2#
  • Tries
    • 1.S5b6+?
      • 1...Rxb6
        • 2.Qe4#
      • 1...Kb4!
    • 1.Qa2+?
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sxa2!
    • 1.Qg4+?
      • 1...Kxd5
        • 2.Qd4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Bf4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qd4#
      • 1...Kxd5
        • 2.Qd4#
      • 1...Re4
        • 2.S5b6#
      • 1...Re5
        • 2.S5b6#
      • 1...Rf6
        • 2.Se3#
      • 1...Be5
        • 2.Se3#
      • 1...Se2
        • 2.Qa2#
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sc6
        • 2.S5b6#
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD::QAR2(A),XR(d)
    • R(d);N_GUARD::QAR2(A)
    • S(a);N_GUARD::QAB(A),XS(a)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(d);XS(C)::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(C)::QAR1(A)
        • R(d);N_GUARD,P_SPINR(d)::QAR2(A),XR(d)
      • Refutation
        • B(h);P_SPINB(h)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(c);S_FLIGHT,XS(C)::QAR1(A)
      • R(d);N_GUARD::S(C)
      • B(h);S_CUTR(d)::S(C)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • S(f);N_GUARD::QAB1(A),XS(f)
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