MESON Chess Problem Database

Problem Display
PID: 154687 (bN1K4/Pk6/r2p4/3P1P2/3QN3/8/8/8 w - - 0 1)

Williams, Philip Hamilton

Sunday Times, 1906

bN1K4/Pk6/r2p4/3P1P2/3QN3/8/8/8

#2

7 + 4

15351 SCPF/BCPS Black Books 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sxd6#
    • 1...Ra2
      • 2.Sxd6#
    • 1...Ra3
      • 2.Sxd6#
    • 1...Ra4
      • 2.Sxd6#
    • 1...Ra5
      • 2.Sxd6#
    • 1...Rb6
      • 2.Qg7#
    • 1...Rc6
      • 2.dxc6#
    • 1...Rxa7
      • 2.Qb2#
      • 2.Qb4#
  • Tries
    • 1.Kd7?
      • 1...Rxa7
        • 2.Qb2#
        • 2.Qb4#
      • 1...Ra1
        • 2.Sxd6#
      • 1...Ra2
        • 2.Sxd6#
      • 1...Ra3
        • 2.Sxd6#
      • 1...Ra4
        • 2.Sxd6#
      • 1...Ra5
        • 2.Sxd6#
      • 1...Rc6
        • 2.dxc6#
      • 1...Rb6!
    • 1.Sd7?
      • 1...Rxa7
        • 2.Qb6#
      • 1...Ra1
        • 2.Qb6#
      • 1...Ra2
        • 2.Qb6#
      • 1...Ra3
        • 2.Qb6#
      • 1...Ra4
        • 2.Qb6#
      • 1...Ra5
        • 2.Qb6#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Rc6!
    • 1.Qb2+?
      • 1...Rb6
        • 2.Qg7#
      • 1...Kxa7!
    • 1.Qf2?
      • 1...Rxa7
        • 2.Qb2#
      • 1...Ra1
        • 2.Sxd6#
      • 1...Ra2
        • 2.Sxd6#
      • 1...Ra3
        • 2.Sxd6#
      • 1...Ra4
        • 2.Sxd6#
      • 1...Ra5
        • 2.Sxd6#
      • 1...Rc6
        • 2.dxc6#
      • 1...Rb6!
    • 1.Qe3?
      • 1...Rxa7
        • 2.Qb3#
      • 1...Ra1
        • 2.Sxd6#
      • 1...Ra2
        • 2.Sxd6#
      • 1...Ra3
        • 2.Sxd6#
      • 1...Ra4
        • 2.Sxd6#
      • 1...Ra5
        • 2.Sxd6#
      • 1...Rc6
        • 2.dxc6#
      • 1...Rb6!
    • 1.Qc5?
      • threat
        • 2.Qc7#
      • 1...Rc6
        • 2.dxc6#
      • 1...dxc5!
    • 1.f6?
      • 1...Rxa7
        • 2.Qb2#
        • 2.Qb4#
      • 1...Ra1
        • 2.Sxd6#
      • 1...Ra2
        • 2.Sxd6#
      • 1...Ra3
        • 2.Sxd6#
      • 1...Ra4
        • 2.Sxd6#
      • 1...Ra5
        • 2.Sxd6#
      • 1...Rc6
        • 2.dxc6#
      • 1...Rb6!
  • Keys
    • 1.Qg1!
      • 1...Rxa7
        • 2.Qb1#
      • 1...Rb6
        • 2.Qg7#
      • 1...Ra1
        • 2.Sxd6#
      • 1...Ra2
        • 2.Sxd6#
      • 1...Ra3
        • 2.Sxd6#
      • 1...Ra4
        • 2.Sxd6#
      • 1...Ra5
        • 2.Sxd6#
      • 1...Rc6
        • 2.dxc6#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::S(B),XP(b)
    • R(a);SBLOCK::QAR(A)
    • R(a);OGATE::P(C),XR(a)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Vars
        • R(a);N_GUARD::S(B),XP(b)
        • R(a);OGATE::P(C),XR(a)
      • Refutation
        • R(a);
    • Try
      • S(F);
      • Vars
        • R(a);N_GUARD,XP(E)::QAR1(A)
        • R(a);N_GUARD::QAR1(A)
        • R(a);N_GUARD::QAR1(A),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);P_SPINR(a),SBLOCK::QAR(A)
      • Refutation
        • K(c);P-FLIGHT,XP(E)
    • Try
      • Q(A);
      • Vars
        • R(a);N_GUARD,SBLOCK,XP(E)::QAR(A)
        • R(a);N_GUARD::S(B),XP(b)
        • R(a);OGATE::P(C),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(A);
      • Vars
        • R(a);N_GUARD,SBLOCK,XP(E)::QAR(A)
        • R(a);N_GUARD::S(B),XP(b)
        • R(a);OGATE::P(C),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);OGATE::P(C),XR(a)
      • Refutation
        • P(b);XQ(A)
    • Try
      • P(D);
      • Vars
        • R(a);N_GUARD::S(B),XP(b)
        • R(a);OGATE::P(C),XR(a)
      • Refutation
        • R(a);
  • Actual
    • Q(A);
    • Vars
      • R(a);N_GUARD,SBLOCK,XP(E)::QAR(A)
      • R(a);SBLOCK::QAR(A)
      • R(a);N_GUARD::S(B),XP(b)
      • R(a);OGATE::P(C),XR(a)
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