MESON Chess Problem Database

Problem Display
PID: 258932 (2b5/4b1pB/p5rN/4Nrp1/2QPkpRn/2P4R/p4PPp/K4n2 w - - 0 1)

Clark, Robert Winslow

Western Morning Mercury, 1922

(First published on Sat May 13 1922)

2b5/4b1pB/p5rN/4Nrp1/2QPkpRn/2P4R/p4PPp/K4n2

#2

11 + 13

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.d5#
    • 1...Rf7
      • 2.Qc6#
    • 1...Rf8
      • 2.Qc6#
    • 1...Rc6
      • 2.Qxc6#
    • 1...Bd6
      • 2.Qc6#
    • 1...Bf6
      • 2.Qc6#
    • 1...Sd2
      • 2.Re3#
    • 1...Se3
      • 2.Rxe3#
    • 1...Sf3
      • 2.gxf3#
  • Tries
    • 1.Sc6?
      • threat
        • 2.d5#
      • 1...Rxc6
        • 2.Qxc6#
      • 1...Rd5
        • 2.Qd3#
      • 1...Rc5
        • 2.dxc5#
      • 1...Bc5
        • 2.dxc5#
      • 1...Sd2
        • 2.Re3#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sf3
        • 2.gxf3#
      • 1...Bf6!
  • Keys
    • 1.Sef7!
      • threat
        • 2.d5#
      • 1...Rxf7
        • 2.Qc6#
      • 1...Bf6
        • 2.Sd6#
      • 1...Rc5
        • 2.dxc5#
      • 1...Rd5
        • 2.Qd3#
      • 1...Rc6
        • 2.Qxc6#
      • 1...Bc5
        • 2.dxc5#
      • 1...Sd2
        • 2.Re3#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sf3
        • 2.gxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(g);P_SPINR(j),SBLOCK,XS(I)::QAR(F)+P(G)
    • R(g);P_SPINR(j)::QAB(F)
    • R(j);N_GUARD,P_SPINR(g)::QAB(F),XR(j)
    • B(k);S_CUTR(j)::QAB(F)
    • S(a);N_GUARD::R1(E)
    • S(a);N_GUARD::R1(E),XS(a)
    • S(f);OGATE::P(C),XS(f)
  • Tries
    • Try
      • S(I);
      • Threat
        • QAR(F)+P(G)
      • Vars
        • R(j);OGATE,P_SPINR(g),XS(I)::QAB(F),XR(j)
        • R(g);P_SPINR(j),SBLOCK::QAB1(F)
        • R(g);OGATE,P_SPINR(j)::QAR(F)+P(G),XR(g)
        • B(k);OGATE::QAR(F)+P(G),XB(k)
        • S(a);N_GUARD::R1(E)
        • S(a);N_GUARD::R1(E),XS(a)
        • S(f);OGATE::P(C),XS(f)
      • Refutation
        • B(k);
  • Actual
    • S(I);
    • Threat
      • QAR(F)+P(G)
    • Vars
      • R(g);N_GUARD,P_SPINR(j),XS(I)::QAB(F)
      • B(k);N_GUARD,S_CUTR(j)::S(I)
      • R(g);OGATE,P_SPINR(j)::QAR(F)+P(G),XR(g)
      • R(g);P_SPINR(j),SBLOCK::QAB1(F)
      • R(j);N_GUARD,P_SPINR(g)::QAB(F),XR(j)
      • B(k);OGATE::QAR(F)+P(G),XB(k)
      • S(a);N_GUARD::R1(E)
      • S(a);N_GUARD::R1(E),XS(a)
      • S(f);OGATE::P(C),XS(f)
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