MESON Chess Problem Database

Problem Display
PID: 265047 (1r2B3/R2r4/N6p/1N2Q2K/kqp5/2p5/P7/1R6 w - - 0 1)

Clements, HT

Sunday Referee, 1936

(First published on Sun May 17 1936)

1r2B3/R2r4/N6p/1N2Q2K/kqp5/2p5/P7/1R6

#2

8 + 7

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sc5#
      • 2.Sac7#
    • 1...Qa5
      • 2.Sc5#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qd6
      • 2.Sc5#
    • 1...Qe7
      • 2.Sc5#
      • 2.Sac7#
    • 1...Qf8
      • 2.Sc5#
      • 2.Sac7#
    • 1...Qxb5
      • 2.Sc5#
    • 1...Rd1
      • 2.Sxb4#
      • 2.Sc5#
    • 1...Rd2
      • 2.Sxb4#
      • 2.Sc5#
    • 1...Rd3
      • 2.Sxb4#
      • 2.Sc5#
    • 1...Rd4
      • 2.Sxb4#
      • 2.Sc5#
    • 1...Rd5
      • 2.Sxb4#
      • 2.Sc5#
    • 1...Rd6
      • 2.Sc5#
    • 1...Rdb7
      • 2.Sc5#
    • 1...Rc7
      • 2.Sc5#
    • 1...Re7
      • 2.Sc5#
    • 1...Rf7
      • 2.Sc5#
    • 1...Rg7
      • 2.Sc5#
    • 1...Rh7
      • 2.Sc5#
    • 1...Rdd8
      • 2.Sxb4#
      • 2.Sc5#
    • 1...Rxb5
      • 2.Sc5#
  • Tries
    • 1.Sxc3+?
      • 1...Qxc3
        • 2.Sb4#
        • 2.Sc5#
      • 1...Ka3!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qxb4#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qxb5+
        • 2.Sc5#
      • 1...Rxb5+
        • 2.Sc5#
      • 1...Ka5
        • 2.Sac7#
      • 1...Kxb5
        • 2.Sc7#
      • 1...Qxd6
        • 2.Sc5#
      • 1...Qxb1
        • 2.Sac7#
      • 1...Rxd6
        • 2.Sc5#
      • 1...Qa5
        • 2.Sc5#
        • 2.Qa3#
      • 1...Qa3
        • 2.Sc5#
        • 2.Sac7#
        • 2.Qxa3#
      • 1...Qb2
        • 2.Sac7#
      • 1...Qb3
        • 2.Sac7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(c);::S(F)
    • Q(c);P_PINQ(D)::R(G)+S(F),DCHECK,XQ(c)
    • Q(c);::R(G)+S(F),DCHECK
    • Q(c);P_PINQ(D),XS(C)::R(G)+S(F),DCHECK
    • R(f);::R(G)+S(F),DCHECK
    • R(g);P_PINQ(D),SBLOCK,XS(C)::R(G)+S(F),DCHECK
  • Tries
    • Try
      • S(C);CHECK,P_PINR(f),XP(a)
      • Refutation
        • K(b);N_SPINR(f),P-FLIGHT
  • Actual
    • Q(D);
    • Threat
      • QAR1(D),XQ(c)
    • Vars
      • Q(c);CHECK::R(G)+S(F),DCHECK,XQ(c)
      • Q(c);CHECK,XS(C)::R(G)+S(F),DCHECK
      • R(g);CHECK,SBLOCK,XS(C)::R(G)+S(F),DCHECK
      • K(b);P-FLIGHT,S_CUTQ(c)::R(G)+S(F)
      • K(b);P_SPINQ(c),P_SPINR(f),S_FLIGHT,XS(C)::S(F)
      • Q(c);XQ(D)::R(G)+S(F),DCHECK
      • Q(c);N_GUARD,XR(A)::R(G)+S(F)
      • R(f);XQ(D)::R(G)+S(F),DCHECK
      • Q(c);N_GUARD::R(G)+S(F)
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