MESON Chess Problem Database

Problem Display
PID: 33699 (b2NR2B/3P1R2/rb4P1/5B2/2n2kPP/3PNrp1/q4pQ1/5n1K w - - 0 1)

Petite, Efren

The Problemist, 2001

b2NR2B/3P1R2/rb4P1/5B2/2n2kPP/3PNrp1/q4pQ1/5n1K

#2

13 + 10

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Be6#
    • 1...Bxe3
      • 2.Be6#
    • 1...Be4
      • 2.Rxe4#
    • 1...Bd5
      • 2.Sxd5#
    • 1...Sfxe3
      • 2.Se6#
    • 1...Scxe3
      • 2.Be5#
  • Keys
    • 1.Qh3!
      • threat
        • 2.Sg2#
      • 1...Rxe3+
        • 2.Be4#
      • 1...g2+
        • 2.Sxg2#
      • 1...Bxe3
        • 2.Be6#
      • 1...Sfxe3
        • 2.Se6#
      • 1...Scxe3
        • 2.Be5#

Anticipated by 6504(1929)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(d);P_PINQ(B),SBLOCK,XS(D)::R(J)+B(G)
    • B(i);SBLOCK,XS(D)::R(J)+B(G)
    • B(j);N_GUARD::R1(L),XB(j)
    • B(j);N_GUARD::S(D),XB(j)
    • S(a);SBLOCK,XS(D)::S(K)
    • S(f);N_GUARD,SBLOCK,XS(D)::B(M)
  • Actual
    • Q(B);
    • Threat
      • S(D)
    • Vars
      • R(d);CHECK,SBLOCK,XS(D)::R(J)+B(G)
      • P(e);CHECK::S(D),XP(e)
      • B(i);SBLOCK,XS(D)::R(J)+B(G)
      • S(a);SBLOCK,XS(D)::S(K)
      • S(f);N_GUARD,SBLOCK,XS(D)::B(M)
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