MESON Chess Problem Database

Problem Display
PID: 229369 (B3nb2/1q1r2r1/R3pp2/3k1p2/2N3b1/3K1p2/5B2/2R4Q w - - 0 1)

Eddy, Edwin John

Sunday Chronicle, 1947

(First published on Sun Oct 19 1947)

B3nb2/1q1r2r1/R3pp2/3k1p2/2N3b1/3K1p2/5B2/2R4Q

#2

7 + 11

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Bxc6#
    • 1...Bh3
      • 2.Qxf3#
    • 1...Sc7
      • 2.Bxb7#
    • 1...e5
      • 2.Se3#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Se3#
      • 1...Qc6
        • 2.Bxc6#
      • 1...f4!
    • 1.Ra5+?
      • 1...Bc5
        • 2.Rxc5#
      • 1...Kc6+!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qxe6#
      • 1...Rd6
        • 2.Qa5#
      • 1...Qc6
        • 2.Bxc6#
      • 1...Rde7
        • 2.Qa5#
      • 1...Rge7
        • 2.Qa5#
      • 1...Bd6
        • 2.Sb6#
      • 1...Sd6
        • 2.Sb6#
      • 1...Sc7
        • 2.Bxb7#
      • 1...f4
        • 2.Qe4#
      • 1...e5
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(g);OGATE::B(G),XQ(g)
    • B(b);N_GUARD::QAB(B),XP(a)
    • S(j);S_CUTR(h)::B(G),XQ(g)
    • P(e);SBLOCK::S(E)
  • Tries
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • Q(g);OGATE::B(G),XQ(g)
      • Refutation
        • P(d);
    • Try
      • R(F);CHECK
      • Vars
        • B(k);N_GUARD,P_SPINB(k)::R1(F),XB(k)
      • Refutation
        • K(c);CHECK,S_FLIGHT
  • Actual
    • Q(B);N_PINP(a)
    • Threat
      • QAB1(B),XP(e)
    • Vars
      • R(h);S_CUTB(k)::QAR(B)
      • Q(g);OGATE::B(G),XQ(g)
      • R(i);S_CUTB(k)::QAR(B)
      • B(k);SBLOCK::S(E)
      • S(j);SBLOCK::S(E)
      • S(j);S_CUTR(h)::B(G),XQ(g)
      • P(d);N_GUARD::QAB1(B)
      • P(e);SBLOCK::S(E)
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