MESON Chess Problem Database

Problem Display
PID: 79027 (5N1B/2R1qB2/3PN1Rr/5k1b/2p2pn1/3P3Q/4K2p/6b1 w - - 0 1)

Lytton, Cedric C (was Sells, CCL)

The Tablet, 1961

(First published on Sat Sep 30 1961)

5N1B/2R1qB2/3PN1Rr/5k1b/2p2pn1/3P3Q/4K2p/6b1

#2

10 + 9

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Rxg5#
    • 1...Qxd6
      • 2.Rg5#
    • 1...Qxf8
      • 2.Rg5#
    • 1...Qxe6+
      • 2.Bxe6#
    • 1...Qxc7
      • 2.Rg5#
    • 1...Qd7
      • 2.Rg5#
    • 1...Qxf7
      • 2.Rg5#
      • 2.Rxf7#
    • 1...Qe8
      • 2.Rg5#
    • 1...Bc5
      • 2.Rxc5#
    • 1...cxd3+
      • 2.Qxd3#
    • 1...f3+
      • 2.Qxf3#
  • Tries
    • 1.Qxh5+?
      • 1...Qg5
        • 2.Rxg5#
        • 2.Qxg5#
      • 1...Rxh5!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qe4#
        • 2.Qxf4#
      • 1...Qxe6+
        • 2.Bxe6#
      • 1...cxd3+
        • 2.Qxd3#
      • 1...Qxd6
        • 2.Rg5#
        • 2.Qe4#
      • 1...Sf6
        • 2.Rg5#
      • 1...h1Q
        • 2.Qxf4#
      • 1...h1B
        • 2.Qxf4#
      • 1...Qg5
        • 2.Rxg5#
        • 2.Qe4#
      • 1...Be3
        • 2.Qe4#
      • 1...Sf2
        • 2.Rc5#
      • 1...Se3
        • 2.Sd4#
      • 1...Se5
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • Q(i);N_GUARD,N_PINS(E)::R1(F),XQ(i)
    • Q(i);N_GUARD,N_PINS(E),XP(D)::R1(F)
    • Q(i);N_GUARD,N_PINS(E),XS(I)::R1(F)
    • Q(i);CHECK,OGATE,XS(E)::B(H),XQ(i)
    • Q(i);N_GUARD,N_PINS(E),XR(G)::R1(F)
    • Q(i);N_GUARD,N_PINS(E)::R1(F)
    • Q(i);N_GUARD::R1(F)
    • B(a);N_GUARD::R(G),XB(a)
    • P(c);CHECK,OGATE,XP(B)::QAB(C),XP(c)
    • P(d);CHECK,OGATEB::QAR2(C),XP(d)
  • Tries
    • Try
      • Q(C);CHECK,N_PINS(e),XB(g)
      • Refutation
        • R(h);XQ(C)
  • Actual
    • Q(C);N_PINS(e),P_PINP(d)
    • Threat
      • DUALS(2)
    • Vars
      • Q(i);CHECK,OGATE,XS(E)::B(H),XQ(i)
      • P(c);CHECK,OGATE,XP(B)::QAB(C),XP(c)
      • S(e);P_PINQ(C),S_CUTQ(i)::R1(F)
      • P(b);::QAR1(C),XP(d)
      • B(a);N_PINS(E)::QAB1(C)
      • S(e);N_GUARD,P_PINQ(C),S_CUTB(a)::R(G)
      • S(e);N_PINS(E),P_PINQ(C)::S(E)
      • S(e);N_PINS(E),P_PINQ(C),SBLOCK::S(E)
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