MESON Chess Problem Database

Problem Display
PID: 156605 (2KN4/B3pB1b/n3R3/P2k4/p1p3nR/3p4/N2Q3r/b4r2 w - - 0 1)

Lukashev, Viktor Sergeevich

Best Problems, 2006

2KN4/B3pB1b/n3R3/P2k4/p1p3nR/3p4/N2Q3r/b4r2

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bc3
      • 2.Sxc3#
    • 1...Sb4
      • 2.Sxb4#
    • 1...Sc7
      • 2.Sb4#
    • 1...Sb8
      • 2.Sb4#
  • Tries
    • 1.Re5+?
      • 1...Kd6
        • 2.Rd5#
      • 1...Kxe5!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qb7#
      • 1...Sxb4
        • 2.Sxb4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Rb1
        • 2.Rxe7#
      • 1...Rb2
        • 2.Sc3#
      • 1...Se5
        • 2.Rd6#
      • 1...Sb8
        • 2.Qc5#
        • 2.Qb5#
      • 1...c3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::S(A),XB(a)
    • S(i);N_GUARD::S(A),XS(i)
    • S(i);N_GUARD::S(A)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(h);P-FLIGHT::R1(E)
      • Refutation
        • K(h);N_SPINP(d),P-FLIGHT,XR(E)
  • Actual
    • Q(B);N_PINP(d)
    • Threat
      • QAB(B)
    • Vars
      • S(i);XQ(B)::S(A),XS(i)
      • S(i);N_GUARD::QAR1(B),XS(i)
      • R(b);N_GUARD::B(G)+R(E),XP(j)
      • R(c);S_CUTB(a)::S(A)
      • S(g);SBLOCK::B(G)+R(E),DCHECK
      • P(f);OGATE::QAR1(B)
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