MESON Chess Problem Database

Problem Display
PID: 275283 (1qrrb3/p7/4p3/bnp1Q3/B1kpPK2/P1NN4/1P2P3/8 w - - 0 1)

Easter, Norris

British Chess Magazine, 1935

1qrrb3/p7/4p3/bnp1Q3/B1kpPK2/P1NN4/1P2P3/8

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5+
      • 2.Sxe5#
    • 1...Bxc3
      • 2.b3#
    • 1...Sd6
      • 2.Qxe6#
    • 1...Sc7
      • 2.Qxc5#
    • 1...dxc3
      • 2.b3#
  • Keys
    • 1.Sb1!
      • threat
        • 2.b3#
      • 1...Qxe5+
        • 2.Sxe5#
      • 1...Bd2+
        • 2.Sxd2#
      • 1...Sxa3
        • 2.Sxa3#
      • 1...Sc3
        • 2.Sd2#
      • 1...Sd6
        • 2.Qxe6#
      • 1...Sc7
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(h);CHECK,XQ(I)::S(E),XQ(h)
    • B(c);SBLOCK,XS(D)::P(A)
    • S(d);N_PINQ(I)::QAB(I),XP(f)
    • S(d);N_PINQ(I)::QAR1(I),XP(e)
    • P(b);XS(D)::P(A)
  • Actual
    • S(D);
    • Threat
      • P(A)
    • Vars
      • Q(h);CHECK,XQ(I)::S(E),XQ(h)
      • B(c);CHECK,N_GUARD::S(D),XB(c)
      • S(d);XP(C)::S(D),XS(d)
      • S(d);S_CUTB(c)::S(D)
      • S(d);N_PINQ(I)::QAB(I),XP(f)
      • S(d);N_PINQ(I)::QAR1(I),XP(e)
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