MESON Chess Problem Database

Problem Display
PID: 199862 (8/2rn4/8/1N6/1N1Bk1p1/2p1n3/4bQP1/2b1R1K1 w - - 0 1)

Dale, John

The Observer, 1946

(First published on Sun Sep 22 1946)

8/2rn4/8/1N6/1N1Bk1p1/2p1n3/4bQP1/2b1R1K1

#2

7 + 8

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Sd6#
    • 1...Sf1
      • 2.Sd6#
    • 1...Sc2
      • 2.Sd6#
    • 1...Sxg2
      • 2.Sd6#
    • 1...Sc4
      • 2.Sxc3#
    • 1...Sd5
      • 2.Sd6#
  • Keys
    • 1.g3!
      • threat
        • 2.Qf4#
      • 1...Bf3
        • 2.Qc2#
      • 1...Sd1
        • 2.Sd6#
      • 1...Sf1
        • 2.Sd6#
      • 1...Sc2
        • 2.Sd6#
      • 1...Sg2
        • 2.Sd6#
      • 1...Sc4
        • 2.Sxc3#
      • 1...Sd5
        • 2.Sd6#
      • 1...Sf5
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(d);P_SPINB(b)::S(G)
    • S(d);P_SPINB(b),XP(D)::S(G)
    • S(d);P_SPINB(b),S_CUTR(g)::S(G),XP(c)
  • Actual
    • P(D);
    • Threat
      • QAR1(C)
    • Vars
      • B(b);OGATE,P_SPINS(d),SBLOCK::QAB(C)
      • S(d);P_SPINB(b)::S(G)
      • S(d);P_SPINB(b),S_CUTR(g)::S(G),XP(c)
      • S(d);N_GUARD,P_SPINB(b),SBLOCK::QAB(C)
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