MESON Chess Problem Database

Problem Display
PID: 178698 (2n3B1/5N2/3pp1P1/K6R/3pk1P1/Q3P3/p3N1P1/4R2n w - - 0 1)

Onkoud, Abdelaziz

Phenix, 2018

2n3B1/5N2/3pp1P1/K6R/3pk1P1/Q3P3/p3N1P1/4R2n

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
    • 1...Sb6
      • 2.Sxd6#
    • 1...Sa7
      • 2.Sxd6#
    • 1...Se7
      • 2.Sxd6#
    • 1...d3
      • 2.Sc3#
    • 1...d5
      • 2.Re5#
    • 1...e5
      • 2.Sg5#
  • Tries
    • 1.Bh7?
      • threat
        • 2.g7#
      • 1...d3
        • 2.Sc3#
      • 1...Sg3
        • 2.Sxg3#
      • 1...Se7
        • 2.Sxd6#
      • 1...e5!
    • 1.Rd1?
      • threat
        • 2.Rxd4#
        • 2.Qd3#
      • 1...dxe3
        • 2.Rd4#
        • 2.Qb4#
        • 2.Qd3#
        • 2.Qa4#
      • 1...d3
        • 2.Qxd3#
      • 1...e5
        • 2.Sg5#
      • 1...a1B
        • 2.Qd3#
      • 1...a1R
        • 2.Rxd4#
      • 1...Sf2
        • 2.Sg3#
        • 2.Rxd4#
      • 1...a1Q!
    • 1.Rf1?
      • threat
        • 2.Rf4#
      • 1...e5
        • 2.Sg5#
      • 1...Sf2
        • 2.Sg3#
      • 1...d3!
    • 1.Rb5?
      • threat
        • 2.Sg5#
      • 1...d3
        • 2.Sc3#
      • 1...d5!
    • 1.Rf5?
      • threat
        • 2.Sg5#
      • 1...d3
        • 2.Sc3#
      • 1...exf5!
  • Keys
    • 1.g7!
      • threat
        • 2.Bh7#
      • 1...d3
        • 2.Sc3#
      • 1...e5
        • 2.Sg5#
      • 1...Sg3
        • 2.Sxg3#
      • 1...Se7
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • S(g);N_GUARD::S(J),XP(e)
    • P(c);N_GUARD,SBLOCK::S(B)
    • P(e);N_GUARD::R1(H)
    • P(f);SBLOCK::S(J)
  • Tries
    • Try
      • B(K);
      • Threat
        • B(K)+P(I)
      • Vars
        • P(c);N_GUARD,SBLOCK::S(B)
        • S(a);N_GUARD::S(B),XS(a)
        • S(g);N_GUARD::S(J),XP(e)
      • Refutation
        • P(f);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAB1(D),XP(c)
        • P(f);SBLOCK::S(J)
        • P(b);::QAB1(D)
        • P(b);P_PINQ(D)::R1(A),XP(c)
      • Refutation
        • P(b);P_PINQ(D)
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • P(f);SBLOCK::S(J)
        • S(a);N_GUARD::S(B)
      • Refutation
        • P(c);
    • Try
      • R(H);
      • Threat
        • S(J)
      • Vars
        • P(c);N_GUARD,SBLOCK::S(B)
      • Refutation
        • P(e);
    • Try
      • R(H);
      • Threat
        • S(J)
      • Vars
        • P(c);N_GUARD,SBLOCK::S(B)
      • Refutation
        • P(f);XR(H)
  • Actual
    • P(I);
    • Threat
      • B(K)
    • Vars
      • P(c);N_GUARD,SBLOCK::S(B)
      • P(f);SBLOCK::S(J)
      • S(a);N_GUARD::S(B),XS(a)
      • S(g);N_GUARD::S(J),XP(e)
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