MESON Chess Problem Database

Problem Display
PID: 271954 (6bb/1n6/p5q1/p3N2p/k2N3R/P6R/P1p1Q3/K1n5 w - - 0 1)

Jones, JJ

1st HM., Sunday Referee, 1934

(First published on Sun Feb 11 1934)

6bb/1n6/p5q1/p3N2p/k2N3R/P6R/P1p1Q3/K1n5

#2

8 + 10

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qe8
      • 2.Se6#
    • 1...Qe6
      • 2.Sxe6#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Bh7
      • 2.Qc4#
  • Tries
    • 1.Sf5+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Qg4!
    • 1.Se6+?
      • 1...Qe4
        • 2.Rxe4#
      • 1...Qg4!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sb2#
      • 1...Sb3+
        • 2.axb3#
      • 1...Bxc4
        • 2.Qxc4#
      • 1...Qd3
        • 2.Qe8#
      • 1...Qg3
        • 2.Qe8#
      • 1...Qb6
        • 2.Sxb6#
      • 1...Sd3
        • 2.Qxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(g);N_GUARD::R(G)+S(F)
    • Q(g);N_GUARD::R(G)+S(F),XQ(g)
    • B(i);N_GUARD::QAR2(C),XB(i)
    • B(i);N_GUARD::QAR2(C)
  • Tries
    • Try
      • S(F);CHECK,P_SPINS(H)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAR2(C),XB(i)
      • Refutation
        • Q(g);P_SPINQ(g)
    • Try
      • S(F);CHECK,P_SPINS(H)
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g)::R(G),XQ(g)
      • Refutation
        • Q(g);P_SPINQ(g)
  • Actual
    • S(H);P_SPINS(F)
    • Threat
      • S(H)
    • Vars
      • S(a);CHECK,OGATE::P(B),XS(a)
      • B(i);OGATE,XS(H)::QAR2(C),XB(i)
      • Q(g);N_GUARD::QAB(C)
      • Q(g);N_GUARD::S(H),XQ(g)
      • S(a);N_GUARD,S_CUTQ(g)::QAB(C),XP(b)
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