MESON Chess Problem Database

Problem Display
PID: 78980 (3q3r/N4B2/1Nb5/3n3Q/1k1P3R/8/2PP1B1p/R1b4K w - - 0 1)

Vaughan, Colin V

The Tablet, 1961

(First published on Sat Feb 25 1961)

3q3r/N4B2/1Nb5/3n3Q/1k1P3R/8/2PP1B1p/R1b4K

#2

11 + 7

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Rxa4#
    • 1...Bb7
      • 2.Ra4#
    • 1...Ba8
      • 2.Ra4#
    • 1...Sc3+
      • 2.Sxc6#
    • 1...Se3+
      • 2.Sxc6#
    • 1...Sf4+
      • 2.Sxc6#
    • 1...Sxb6+
      • 2.Sxc6#
    • 1...Sf6+
      • 2.Sxc6#
    • 1...Sc7+
      • 2.Sxc6#
    • 1...Se7+
      • 2.d5#
  • Tries
    • 1.c3+?
      • 1...Sxc3+
        • 2.Sxc6#
      • 1...Kb3!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qb3#
      • 1...Sxb6
        • 2.c3#
      • 1...Ba3
        • 2.Qxa3#
      • 1...Ba4
        • 2.Rxa4#
      • 1...Sc3
        • 2.dxc3#
      • 1...Se3
        • 2.c3#
      • 1...Sf4
        • 2.c3#
      • 1...Sf6
        • 2.c3#
      • 1...Sc7
        • 2.c3#
      • 1...Se7
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 7
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(e);N_GUARD::R1(A),XB(e)
    • B(e);N_GUARD::R1(A)
    • S(d);CHECK::S(J),XB(e)
    • S(d);CHECK,XS(I)::S(J),XB(e)
    • S(d);CHECK,OGATE::R(G)+P(F)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • S(d);CHECK,XP(C)::S(J),XB(e)
      • Refutation
        • K(c);P-FLIGHT,P_SPINS(d)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • S(d);N_GUARD,P_PINQ(H),XS(I)::P(C)
      • B(a);N_GUARD::QAB1(H),XB(a)
      • B(e);N_GUARD::R1(A),XB(e)
      • S(d);OGATE,P_PINQ(H)::P(D),XS(d)
      • S(d);N_GUARD,P_PINQ(H)::P(C)
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