MESON Chess Problem Database

Problem Display
PID: 258301 (B7/1K6/2Q1P3/1ppp1N2/2k5/P4R2/Pr1P1q2/2Nnn3 w - - 0 1)

Onkoud, Abdelaziz

StrateGems, 2022

B7/1K6/2Q1P3/1ppp1N2/2k5/P4R2/Pr1P1q2/2Nnn3

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sd6#
    • 1...Rb3
      • 2.axb3#
    • 1...Sc3
      • 2.Rxc3#
    • 1...b4
      • 2.Qa6#
    • 1...d4
      • 2.Sd6#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Qxb5#
      • 1...Rxb3
        • 2.axb3#
      • 1...Sc3
        • 2.Rxc3#
      • 1...b4
        • 2.Qa6#
      • 1...d4
        • 2.Sd6#
      • 1...Qxf5!
    • 1.Rf4+?
      • 1...Qd4
        • 2.Sd6#
        • 2.Rxd4#
      • 1...d4
        • 2.Sd6#
      • 1...Qxf4!
    • 1.d4?
      • threat
        • 2.Qxc5#
      • 1...Qxd4
        • 2.Sd6#
      • 1...Sd3!
  • Keys
    • 1.Kb6!
      • threat
        • 2.Qxd5#
      • 1...Qxd2
        • 2.Qxc5#
      • 1...Qxf3
        • 2.Qxc5#
      • 1...Rxd2
        • 2.Qxb5#
      • 1...Qd4
        • 2.Sd6#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Se3
        • 2.Qxc5#
      • 1...d4
        • 2.Sd6#
        • 2.Qd5#
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(d);SBLOCK::S(F)
    • R(c);OGATE::P(B),XR(c)
    • S(a);N_GUARD::R1(E),XS(a)
    • P(f);OGATEB::QAB(G)
    • P(h);SBLOCK::S(F)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAB1(G),XP(f)
      • Vars
        • R(c);OGATE,XR(E)::P(B),XR(c)
        • S(a);N_GUARD::R1(E),XS(a)
        • P(f);OGATEB::QAB(G)
        • P(h);SBLOCK::S(F)
      • Refutation
        • Q(d);XS(F)
    • Try
      • R(E);CHECK
      • Vars
        • P(h);N_SPINP(g),P_SPINP(h)::S(F)
      • Refutation
        • Q(d);XR(E)
    • Try
      • P(C);
      • Threat
        • QAR1(G),XP(g)
      • Vars
        • Q(d);SBLOCK,XP(C)::S(F)
      • Refutation
        • S(b);
  • Actual
    • K(I);P-FLIGHT
    • Threat
      • QAB1(G),XP(h)
    • Vars
      • Q(d);N_GUARD,XP(C)::QAR1(G),XP(g)
      • Q(d);N_GUARD,XR(E)::QAR1(G),XP(g)
      • R(c);N_GUARD,XP(C)::QAB1(G),XP(f)
      • Q(d);SBLOCK::S(F)
      • S(a);N_GUARD::R1(E),XS(a)
      • S(a);S_CUTQ(d)::QAR1(G),XP(g)
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