MESON Chess Problem Database

Problem Display
PID: 137192 (4b2R/B1p1K1pn/5P2/N2k4/3PN2R/2p2p1p/n3P3/4b1Q1 w - - 0 1)

Onkoud, Abdelaziz

HM., Problem Online, 2007

4b2R/B1p1K1pn/5P2/N2k4/3PN2R/2p2p1p/n3P3/4b1Q1

#2

10 + 10

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Bh5
      • 2.Rd8#
    • 1...Bg6
      • 2.Rd8#
    • 1...Bf7
      • 2.Rd8#
    • 1...Sg5
      • 2.Qxg5#
    • 1...Sxf6
      • 2.Qg5#
    • 1...Sf8
      • 2.Qg5#
  • Tries
    • 1.Sf2?
      • threat
        • 2.e4#
      • 1...Sxf6
        • 2.Qg5#
      • 1...fxe2
        • 2.Qh1#
      • 1...Bg6
        • 2.Rd8#
      • 1...Sg5
        • 2.Qxg5#
      • 1...c5!
    • 1.Sxc3+?
      • 1...Bxc3
        • 2.e4#
      • 1...Sxc3!
    • 1.Sc5?
      • threat
        • 2.e4#
      • 1...Sxf6
        • 2.Qg5#
      • 1...fxe2
        • 2.Qh1#
      • 1...Bg6
        • 2.Rd8#
      • 1...Sg5
        • 2.Qxg5#
      • 1...f2
        • 2.Qh1#
      • 1...Bf2!
    • 1.Sg5?
      • threat
        • 2.e4#
      • 1...Sxg5
        • 2.Qxg5#
      • 1...fxe2
        • 2.Qh1#
      • 1...Bg6
        • 2.Rd8#
      • 1...Sxf6!
    • 1.Sd6?
      • threat
        • 2.e4#
      • 1...Sxf6
        • 2.Qg5#
      • 1...fxe2
        • 2.Qh1#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Bg6!
    • 1.Qg4?
      • threat
        • 2.Qf5#
        • 2.Qe6#
      • 1...Bg3
        • 2.Qe6#
      • 1...Bg6
        • 2.Rd8#
        • 2.Qe6#
        • 2.Qd7#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Bf7
        • 2.Rd8#
        • 2.Qf5#
        • 2.Qd7#
      • 1...Sg5
        • 2.Qf5#
        • 2.Qxg5#
      • 1...Sf8
        • 2.Qf5#
        • 2.Qg5#
      • 1...g6
        • 2.Qe6#
      • 1...c5!
  • Keys
    • 1.Sd2!
      • threat
        • 2.e4#
      • 1...Sxf6
        • 2.Qg5#
      • 1...fxe2
        • 2.Qh1#
      • 1...Bg6
        • 2.Rd8#
      • 1...Sg5
        • 2.Qxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(j);OGATE::R(J)
    • S(i);N_GUARD::QAR(A),XS(i)
    • S(i);N_GUARD,XP(G)::QAR(A)
    • S(i);N_GUARD::QAR(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • P(B)
      • Vars
        • S(i);N_GUARD,XP(G)::QAR(A)
        • P(d);OGATEB,XP(B)::QAB(A)
        • B(j);OGATE::R(J)
        • S(i);N_GUARD::QAR(A),XS(i)
      • Refutation
        • P(g);
    • Try
      • S(D);CHECK,XP(c)
      • Vars
        • B(a);XS(D)::P(B)
      • Refutation
        • S(b);XS(D)
    • Try
      • S(D);
      • Threat
        • P(B)
      • Vars
        • S(i);N_GUARD,XP(G)::QAR(A)
        • P(d);OGATEB,XP(B)::QAB(A)
        • B(j);OGATE::R(J)
        • S(i);N_GUARD::QAR(A),XS(i)
        • P(d);OGATEB::QAB(A)
      • Refutation
        • B(a);
    • Try
      • S(D);
      • Threat
        • P(B)
      • Vars
        • S(i);OGATE,XS(D)::QAR(A),XS(i)
        • P(d);OGATEB,XP(B)::QAB(A)
        • B(j);OGATE::R(J)
      • Refutation
        • S(i);XP(G)
    • Try
      • S(D);
      • Threat
        • P(B)
      • Vars
        • S(i);N_GUARD,XP(G)::QAR(A)
        • P(d);OGATEB,XP(B)::QAB(A)
        • S(i);N_GUARD::QAR(A),XS(i)
      • Refutation
        • B(j);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(A)
        • B(j);N_GUARD::QAR2(A),XB(j)
        • P(h);::QAB1(A)
      • Refutation
        • P(g);
  • Actual
    • S(D);
    • Threat
      • P(B)
    • Vars
      • S(i);N_GUARD,XP(G)::QAR(A)
      • P(d);OGATEB,XP(B)::QAB(A)
      • B(j);OGATE::R(J)
      • S(i);N_GUARD::QAR(A),XS(i)
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