MESON Chess Problem Database

Problem Display
PID: 81857 (2NRB2Q/b1B5/1r2k2N/1p3b1q/3p2np/8/8/6K1 w - - 0 1)

Lozek, Jozef

Reeves, Alfred Christopher

The Problemist, 2008

2NRB2Q/b1B5/1r2k2N/1p3b1q/3p2np/8/8/6K1

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Bxf7#
    • 1...Qg5
      • 2.Bf7#
    • 1...Rd6
      • 2.Rxd6#
    • 1...Rb7
      • 2.Rd6#
    • 1...Rb8
      • 2.Rd6#
    • 1...Sf2
      • 2.Qe5#
    • 1...Sh2
      • 2.Qe5#
    • 1...Se3
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sxh6
      • 2.Qe5#
  • Tries
    • 1.Bxh5?
      • threat
        • 2.Bf7#
      • 1...Sxh6
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Bg6!
    • 1.Qxd4?
      • threat
        • 2.Bd7#
      • 1...Qxe8
        • 2.Rxe8#
      • 1...Sxh6
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Qf7
        • 2.Bxf7#
      • 1...Rd6
        • 2.Rxd6#
      • 1...Sf6
        • 2.Qe5#
      • 1...Qxh6!
    • 1.Qg7?
      • threat
        • 2.Qe7#
      • 1...Rd6
        • 2.Rxd6#
      • 1...Qf7
        • 2.Bxf7#
        • 2.Qxf7#
      • 1...Qg5
        • 2.Bf7#
        • 2.Qf7#
      • 1...Qxe8!
    • 1.Qg8+?
      • 1...Qf7
        • 2.Qxf7#
      • 1...Kf6!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qe7#
      • 1...Qxe8
        • 2.Qxf5#
      • 1...Qf7
        • 2.Qxf7#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Qg5
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD::B(F),XQ(f)
    • Q(f);N_GUARD::B(F)
    • R(g);N_GUARD::R1(E),XR(g)
    • R(g);N_GUARD::R1(E)
    • S(b);N_GUARD::QAR1(G)
    • S(b);N_GUARD::QAR1(G),XS(b)
    • S(b);N_GUARD,XS(B)::QAR1(G)
  • Tries
    • Try
      • B(F);XQ(f)
      • Threat
        • B(F)
      • Vars
        • S(b);N_GUARD,XS(B)::QAR1(G)
        • S(b);N_GUARD::QAR1(G),XS(b)
      • Refutation
        • B(e);
    • Try
      • Q(G);XP(a)
      • Threat
        • B(F)
      • Vars
        • Q(f);OGATE,XB(F)::R(E),XQ(f)
        • S(b);N_GUARD,XS(B)::QAR1(G)
        • S(b);N_GUARD::QAR1(G),XS(b)
        • Q(f);N_GUARD::B(F),XQ(f)
        • R(g);N_GUARD,P_PINQ(G)::R1(E),XR(g)
        • S(b);N_GUARD::QAR1(G)
      • Refutation
        • Q(f);XS(B)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • R(g);N_GUARD::R1(E),XR(g)
      • Refutation
        • Q(f);XB(F)
    • Try
      • Q(G);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAB1(G),XQ(f)
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • Q(f);N_GUARD,XB(F)::QAB1(G),XB(e)
      • Q(f);N_GUARD::QAB1(G),XQ(f)
      • R(g);N_GUARD::QAR1(G),XR(g)
      • Q(f);N_GUARD::QAB1(G)
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