MESON Chess Problem Database

Problem Display
PID: 245352 (3N4/1pR1Pp2/rp1NnRb1/1p1k1pn1/1PpP1B2/5P2/8/bK1Q4 w - - 0 1)

Onkoud, Abdelaziz

Problemist Ukraini, 2013

3N4/1pR1Pp2/rp1NnRb1/1p1k1pn1/1PpP1B2/5P2/8/bK1Q4

#2

11 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bh5
      • 2.Rxf5#
  • Tries
    • 1.Sxc4?
      • threat
        • 2.Se3#
      • 1...bxc4
        • 2.Rd7#
      • 1...Ra3
        • 2.Sxb6#
      • 1...Sxf3!
    • 1.Sxb5?
      • threat
        • 2.Rd7#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Sxc7
        • 2.Sxc7#
        • 2.Rd6#
      • 1...Sc5
        • 2.Rd6#
      • 1...Sf8
        • 2.Rd6#
      • 1...c3
        • 2.Qb3#
      • 1...Se4!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Rd7#
      • 1...Bxf5+
        • 2.Rxf5#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Sxc7
        • 2.Rd6#
      • 1...Se4
        • 2.Se3#
      • 1...Sc5
        • 2.Rd6#
      • 1...Sf8
        • 2.Rd6#
      • 1...c3
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • B(j);N_GUARD::R(H),XP(e)
  • Tries
    • Try
      • S(G);XP(b)
      • Threat
        • S(G)
      • Vars
        • P(c);SBLOCK,XS(G)::R(I)
        • R(g);N_GUARD::S(G),XP(h)
      • Refutation
        • S(f);XP(C)
    • Try
      • S(G);XP(c)
      • Threat
        • R(I)
      • Vars
        • S(f);OGATE,XP(C)::QAB(B),XS(f)
        • S(i);OGATE::R1(H)
        • P(b);OGATEB::QAB(B)
      • Refutation
        • S(f);
  • Actual
    • S(G);P_SPINS(G),XP(e)
    • Threat
      • R(I)
    • Vars
      • B(j);CHECK,OGATE,XS(G)::R(H),XB(j)
      • S(f);OGATE,XP(C)::QAB(B),XS(f)
      • S(i);OGATE,XR(I)::R1(H)
      • S(f);N_PINS(G)::S(G)
      • S(i);OGATE::R1(H)
      • P(b);OGATEB::QAB(B)
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