MESON Chess Problem Database

Problem Display
PID: 87471 (8/p2r1Nq1/6bp/2b5/N1k5/5pQ1/P2RPP1K/1R2n3 w - - 0 1)

Cornejo, Jose Jesus

American Chess Problemist, 1949

8/p2r1Nq1/6bp/2b5/N1k5/5pQ1/P2RPP1K/1R2n3

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Sxe5#
    • 1...Qf8
      • 2.Se5#
    • 1...Qh7
      • 2.Se5#
    • 1...Qg8
      • 2.Se5#
    • 1...fxe2
      • 2.Qb3#
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxc5#
      • 1...Qxe5+
        • 2.Sxe5#
      • 1...Bxf2
        • 2.Qb5#
      • 1...Qf8
        • 2.Qc3#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Rc7
        • 2.Qd5#
        • 2.Qe6#
      • 1...Ba3
        • 2.Qb5#
      • 1...Be3
        • 2.Qb5#
      • 1...Bb4
        • 2.Sb2#
      • 1...Bd4
        • 2.Qb5#
      • 1...Bb6
        • 2.Qb5#
      • 1...Bd6
        • 2.Rd4#
      • 1...Be7
        • 2.Qb5#
      • 1...Bf8
        • 2.Qb5#
      • 1...Sd3
        • 2.Rc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 3
  • Sets
    • Q(i);N_GUARD,P_PINQ(G)::S(I),XQ(i)
    • Q(i);N_GUARD::S(I)
    • P(b);OGATE,XP(D)::QAB1(G)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G),XB(d)
    • Vars
      • Q(i);CHECK,XQ(G)::S(I),XQ(i)
      • B(d);OGATE,XP(E)::QAB1(G)
      • Q(i);N_GUARD::QAR1(G)
      • R(h);N_GUARD::QAB1(G),XR(h)
      • B(d);OGATE::QAB1(G)
      • B(d);SBLOCK::S(H)
      • B(d);N_GUARD,P_PINQ(G),S_CUTR(h)::R1(C)
      • S(a);N_GUARD,S_CUTB(e)::R(C)
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