MESON Chess Problem Database

Problem Display
PID: 64388 (2qnN3/2P5/k7/4R3/2P5/4B3/6Q1/6K1 w - - 0 1)

Williams, Philip Hamilton

Chess Amateur (The), 1910

2qnN3/2P5/k7/4R3/2P5/4B3/6Q1/6K1

#2

7 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Qa8#
    • 1...Qf5
      • 2.Qa8#
    • 1...Qe6
      • 2.Qa8#
    • 1...Qb7
      • 2.Qa2#
    • 1...Qd7
      • 2.Qa8#
    • 1...Qxc7
      • 2.Sxc7#
    • 1...Qa8
      • 2.Qxa8#
    • 1...Qb8
      • 2.cxb8S#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Se6
      • 2.Qc6#
    • 1...Sb7
      • 2.Qc6#
    • 1...Sf7
      • 2.Qc6#
  • Tries
    • 1.Kh2?
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Qb7
        • 2.Qa2#
      • 1...Qg4
        • 2.Qa8#
      • 1...Qf5
        • 2.Qa8#
      • 1...Qe6
        • 2.Qa8#
      • 1...Qd7
        • 2.Qa8#
      • 1...Qa8
        • 2.Qxa8#
      • 1...Qb8
        • 2.cxb8S#
      • 1...Se6
        • 2.Qc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Sf7
        • 2.Qc6#
      • 1...Qh3+!
    • 1.Bd4?
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Qh3
        • 2.Qa8#
      • 1...Qf5
        • 2.Qa8#
      • 1...Qe6
        • 2.Qa8#
      • 1...Qb7
        • 2.Qa2#
      • 1...Qd7
        • 2.Qa8#
      • 1...Qa8
        • 2.Qxa8#
      • 1...Qb8
        • 2.cxb8S#
      • 1...Se6
        • 2.Qc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Sf7
        • 2.Qc6#
      • 1...Qg4!
    • 1.Rb5?
      • threat
        • 2.Qa2#
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Qg4!
    • 1.Rg5?
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Qf5
        • 2.Qa8#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Qh3
        • 2.Qa8#
      • 1...Qe6
        • 2.Qa8#
      • 1...Qb7
        • 2.Qa2#
      • 1...Qd7
        • 2.Qa8#
      • 1...Qa8
        • 2.Qxa8#
      • 1...Qb8
        • 2.cxb8S#
      • 1...Se6
        • 2.Qc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Sf7
        • 2.Qc6#
      • 1...Qg4!
    • 1.Rh5?
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Qf5
        • 2.Qa8#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Qh3
        • 2.Qa8#
      • 1...Qe6
        • 2.Qa8#
      • 1...Qb7
        • 2.Qa2#
      • 1...Qd7
        • 2.Qa8#
      • 1...Qa8
        • 2.Qxa8#
      • 1...Qb8
        • 2.cxb8S#
      • 1...Se6
        • 2.Qc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Sf7
        • 2.Qc6#
      • 1...Qg4!
    • 1.Qd5?
      • threat
        • 2.Qb5#
      • 1...Qb7
        • 2.Qa5#
      • 1...Qd7
        • 2.Qa8#
      • 1...Qb8
        • 2.cxb8S#
      • 1...Qg4+!
    • 1.Qb2?
      • threat
        • 2.Qb5#
        • 2.Qb6#
      • 1...Qxc7
        • 2.Sxc7#
        • 2.Qb5#
      • 1...Qe6
        • 2.Qb5#
      • 1...Qb7
        • 2.Qa1#
        • 2.Qa3#
        • 2.Qa2#
      • 1...Qd7
        • 2.Qb6#
      • 1...Qb8
        • 2.cxb8S#
      • 1...Qg4+!
  • Keys
    • 1.Rf5!
      • 1...Qxf5
        • 2.Qa8#
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Qe6
        • 2.Qa8#
      • 1...Qb7
        • 2.Qa2#
      • 1...Qd7
        • 2.Qa8#
      • 1...Qa8
        • 2.Qxa8#
      • 1...Qb8
        • 2.cxb8S#
      • 1...Se6
        • 2.Qc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Sf7
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD::QAR2(B)
    • Q(b);SBLOCK::QAR(B)
    • Q(b);XP(F)::S(G),XQ(b)
    • Q(b);N_GUARD::QAR2(B),XQ(b)
    • Q(b);OGATE::PXQ(b)=S
    • S(c);N_GUARD::QAR2(B),XS(c)
    • S(c);N_GUARD::QAR2(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • Q(b);P_PINR(E),XP(F)::S(G),XQ(b)
        • S(c);N_GUARD::QAR2(B),XS(c)
        • Q(b);SBLOCK::QAR(B)
        • Q(b);N_GUARD::QAR2(B)
        • Q(b);N_GUARD::QAR2(B),XQ(b)
        • Q(b);OGATE::PXQ(b)=S
        • S(c);N_GUARD::QAR2(B)
      • Refutation
        • Q(b);CHECK
    • Try
      • B(C);
      • Vars
        • Q(b);XP(F)::S(G),XQ(b)
        • S(c);N_GUARD::QAR2(B),XS(c)
        • Q(b);N_GUARD::QAR2(B)
        • Q(b);SBLOCK::QAR(B)
        • Q(b);N_GUARD::QAR2(B),XQ(b)
        • Q(b);OGATE::PXQ(b)=S
        • S(c);N_GUARD::QAR2(B)
      • Refutation
        • Q(b);P_PINQ(B)
    • Try
      • R(E);
      • Threat
        • QAR(B)
      • Vars
        • Q(b);XP(F)::S(G),XQ(b)
        • S(c);N_GUARD::QAR2(B),XS(c)
        • S(c);N_GUARD::QAR2(B)
      • Refutation
        • Q(b);P_PINQ(B)
    • Try
      • R(E);
      • Vars
        • Q(b);XP(F)::S(G),XQ(b)
        • Q(b);N_GUARD::QAR2(B)
        • S(c);N_GUARD::QAR2(B),XS(c)
        • Q(b);SBLOCK::QAR(B)
        • Q(b);N_GUARD::QAR2(B),XQ(b)
        • Q(b);OGATE::PXQ(b)=S
        • S(c);N_GUARD::QAR2(B)
      • Refutation
        • Q(b);P_PINQ(B)
    • Try
      • R(E);
      • Vars
        • Q(b);XP(F)::S(G),XQ(b)
        • Q(b);N_GUARD::QAR2(B)
        • S(c);N_GUARD::QAR2(B),XS(c)
        • Q(b);SBLOCK::QAR(B)
        • Q(b);N_GUARD::QAR2(B),XQ(b)
        • Q(b);OGATE::PXQ(b)=S
        • S(c);N_GUARD::QAR2(B)
      • Refutation
        • Q(b);P_PINQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(b);SBLOCK::QAR1(B)
        • Q(b);N_GUARD::QAR2(B)
        • Q(b);OGATE::PXQ(b)=S
      • Refutation
        • Q(b);CHECK
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);::QAB1(B)
        • Q(b);::QAR1(B)
        • Q(b);OGATE::PXQ(b)=S
      • Refutation
        • Q(b);CHECK
  • Actual
    • R(E);
    • Vars
      • Q(b);N_GUARD,XR(E)::QAR2(B)
      • Q(b);XP(F)::S(G),XQ(b)
      • S(c);N_GUARD::QAR2(B),XS(c)
      • Q(b);N_GUARD::QAR2(B)
      • Q(b);SBLOCK::QAR(B)
      • Q(b);N_GUARD::QAR2(B),XQ(b)
      • Q(b);OGATE::PXQ(b)=S
      • S(c);N_GUARD::QAR2(B)
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