MESON Chess Problem Database

Problem Display
PID: 259313 (7B/2p3nb/2KN4/bPp1pR2/RqrkPp2/Q4p2/1p1P1N2/1r2n3 w - - 0 1)

Clark, Robert Winslow

Western Morning News, 1923

(First published on Sat Nov 3 1923)

7B/2p3nb/2KN4/bPp1pR2/RqrkPp2/Q4p2/1p1P1N2/1r2n3

#2

10 + 14

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd2
      • 2.Rxc4#
    • 1...Qxa3
      • 2.Rxc4#
    • 1...Qc3
      • 2.Qxc5#
    • 1...Qb3
      • 2.Qxc5#
    • 1...Qxb5+
      • 2.Sxb5#
    • 1...Rc3
      • 2.Qxc3#
    • 1...Sc2
      • 2.Qd3#
    • 1...Sg2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sh5
      • 2.Bxe5#
    • 1...Se6
      • 2.Bxe5#
    • 1...Se8
      • 2.Bxe5#
  • Tries
    • 1.Bxg7?
      • threat
        • 2.Bxe5#
      • 1...Qxb5+
        • 2.Sxb5#
      • 1...Bxf5
        • 2.Sxf5#
      • 1...Sd3
        • 2.Qxd3#
      • 1...cxd6!
    • 1.Qxb2+?
      • 1...Qc3
        • 2.Rxc4#
      • 1...Qxb2
        • 2.Rxc4#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rxb2!
  • Keys
    • 1.Rxf4!
      • threat
        • 2.Qe3#
      • 1...Qxb5+
        • 2.Sxb5#
      • 1...Bxe4+
        • 2.Rxe4#
      • 1...Qxd2
        • 2.Rxc4#
      • 1...Qxa3
        • 2.Rxc4#
      • 1...exf4
        • 2.Bxg7#
      • 1...Qc3
        • 2.Qxc5#
      • 1...Qb3
        • 2.Qxc5#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Sc2
        • 2.Qd3#
      • 1...Sg2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sf5
        • 2.exf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(e);OGATE,P_SPINR(f),XP(A)::R1(D),XR(f)
    • Q(e);OGATE,P_SPINR(f),XQ(C)::R1(D),XR(f)
    • Q(e);OGATE,P_SPINR(f)::QAB1(C),XP(j)
    • Q(e);CHECK,P_SPINR(f),XP(F)::S(I),XQ(e)
    • R(f);N_GUARD,P_SPINQ(e)::QAB1(C),XR(f)
    • S(b);N_GUARD::QAR1(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
    • S(m);OGATE,P_SPINP(k)::B(J),XP(k)
  • Tries
    • Try
      • B(J);P_PINP(k),XS(m)
      • Threat
        • B(J),XP(k)
      • Vars
        • Q(e);CHECK,P_SPINR(f),XP(F)::S(I),XQ(e)
        • B(n);XR(G)::S(I),XB(n)
        • S(b);N_GUARD::QAR1(C),XS(b)
      • Refutation
        • P(l);XS(I)
    • Try
      • Q(C);CHECK,XP(c)
      • Vars
        • Q(e);OGATE,P_SPINQ(e),P_SPINR(f)::R1(D),XR(f)
        • Q(e);OGATE,P_SPINR(f),XQ(C)::R1(D),XR(f)
        • R(f);N_GUARD,P_SPINQ(e),P_SPINR(f)::QAB1(C),XR(f)
      • Refutation
        • R(a);XQ(C)
  • Actual
    • R(G);XP(h)
    • Threat
      • QAB1(C)
    • Vars
      • Q(e);CHECK,P_SPINR(f),XP(F)::S(I),XQ(e)
      • B(n);CHECK,OGATE,P_SPINB(n),XP(E)::R1(G),XB(n)
      • Q(e);OGATE,P_SPINR(f),XP(A)::R1(D),XR(f)
      • Q(e);OGATE,P_SPINR(f),XQ(C)::R1(D),XR(f)
      • P(k);OGATEB,P_SPINS(m),XR(G)::B(J),XS(m)
      • Q(e);OGATE,P_SPINR(f)::QAB1(C),XP(j)
      • R(f);N_GUARD,P_SPINQ(e)::QAB1(C),XR(f)
      • S(b);N_GUARD::QAR1(C)
      • S(b);N_GUARD::QAR1(C),XS(b)
      • S(m);OGATE,P_SPINP(k)::R(G)+P(E),XS(m)
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