MESON Chess Problem Database

Problem Display
PID: 62076 (4B3/2R2N2/1p2PR1P/3k1p2/q2n3K/nr3pN1/2pQpB2/8 w - - 0 1)

Easter, Norris

British Chess Magazine, 1933

4B3/2R2N2/1p2PR1P/3k1p2/q2n3K/nr3pN1/2pQpB2/8

#2

10 + 10

371 The Chess Review 1936

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Qxd4#
    • 1...Qc6
      • 2.Qxd4#
    • 1...Qd7
      • 2.Qxd4#
    • 1...Qxe8
      • 2.Qxd4#
    • 1...Qa5
      • 2.Qxd4#
    • 1...Qa6
      • 2.Qxd4#
    • 1...Qa7
      • 2.Qxd4#
    • 1...Qa8
      • 2.Qxd4#
    • 1...Sc4
      • 2.Qxd4#
  • Tries
    • 1.Bc6+?
      • 1...Kc4
        • 2.Qxd4#
      • 1...Qxc6
        • 2.Qxd4#
      • 1...Kc5!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe5#
        • 2.Qd6#
      • 1...Sxe6
        • 2.Rxf5#
      • 1...Qc6
        • 2.Qxd4#
      • 1...e1Q
        • 2.Qd6#
      • 1...e1R
        • 2.Qd6#
      • 1...Qd7
        • 2.Qe5#
        • 2.Qxd4#
      • 1...Qb4
        • 2.Qe5#
      • 1...Re3
        • 2.Qd6#
      • 1...Sc4
        • 2.Qxd4#
      • 1...Sab5
        • 2.Qe5#
      • 1...Sdb5
        • 2.Bc6#
      • 1...Sc6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD::QAR1(A),XS(g)
    • Q(f);N_GUARD,XB(J)::QAR1(A),XS(g)
    • S(c);S_CUTQ(f)::QAR1(A),XS(g)
  • Tries
    • Try
      • B(J);CHECK
      • Vars
        • K(h);N_SPINS(g),S_FLIGHT::QAR1(A),XS(g)
        • Q(f);XB(J)::QAR1(A),XS(g)
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • Q(A);N_PINS(g)
    • Threat
      • DUALS(2)
    • Vars
      • S(g);N_GUARD,P_PINQ(A),SBLOCK,XP(E)::R(F),XP(i)
      • Q(f);N_GUARD::QAR1(A),XS(g)
      • P(b);::QAR1(A)
      • Q(f);::QAR1(A)
      • R(d);::QAR1(A)
      • S(c);S_CUTQ(f)::QAR1(A),XS(g)
      • S(c);::QAR1(A)
      • S(g);N_GUARD,P_PINQ(A),S_CUTQ(f)::B(J)
      • S(g);P_PINQ(A),SBLOCK,S_CUTQ(f)::R(H)
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