MESON Chess Problem Database

Problem Display
PID: 223600 (1BnKN3/5P2/B1ppP3/P1k1rr1R/pn4R1/2N1P3/q7/8 w - - 0 1)

Makaronets, Leonid

Best Problems, 2020

1BnKN3/5P2/B1ppP3/P1k1rr1R/pn4R1/2N1P3/q7/8

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rc4#
    • 1...Qc4
      • 2.Rxc4#
    • 1...Qd5
      • 2.Sxa4#
    • 1...Qa1
      • 2.Rc4#
    • 1...Qb2
      • 2.Rc4#
    • 1...Qc2
      • 2.Rc4#
    • 1...Qd2
      • 2.Rc4#
    • 1...Qf2
      • 2.Rc4#
    • 1...Qg2
      • 2.Rc4#
    • 1...Qh2
      • 2.Rc4#
    • 1...Qa3
      • 2.Rc4#
    • 1...Rd5
      • 2.Se4#
    • 1...Sb6
      • 2.Bxd6#
    • 1...Sa7
      • 2.Bxd6#
      • 2.Bxa7#
    • 1...Se7
      • 2.Bxd6#
      • 2.Ba7#
  • Tries
    • 1.Kxc8?
      • threat
        • 2.Bxd6#
        • 2.Ba7#
      • 1...Rxe6
        • 2.Ba7#
      • 1...Rxf7
        • 2.Bxd6#
      • 1...Qd5
        • 2.Sxa4#
        • 2.Ba7#
      • 1...Qd2
        • 2.Ba7#
        • 2.Rc4#
      • 1...Rd5
        • 2.Se4#
        • 2.Ba7#
      • 1...Sd5
        • 2.Bxd6#
      • 1...d5
        • 2.Bd6#
        • 2.Ba7#
      • 1...Qxe6+!
    • 1.Sxa4+?
      • 1...Kd5
        • 2.Sc7#
      • 1...Qxa4!
    • 1.Se4+?
      • 1...Kd5
        • 2.Sc7#
      • 1...Rxe4!
    • 1.Ba7+?
      • 1...Sb6
        • 2.Bxb6#
      • 1...Sxa7!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Sb7#
      • 1...Rxf7
        • 2.Sde4#
      • 1...Sxd6
        • 2.Ba7#
      • 1...Qd5
        • 2.Sxa4#
      • 1...Qd2
        • 2.Rc4#
      • 1...Rd5
        • 2.Se4#

This is after 214818

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(a);N_GUARD::R1(C)
    • Q(a);N_GUARD::R1(C),XQ(a)
    • Q(a);N_GUARD,SBLOCK::S(A),XP(b)
    • R(e);N_GUARD,SBLOCK::S(A)
    • S(i);N_GUARD::B(I),XP(h)
  • Tries
    • Try
      • K(J);P-FLIGHT,XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);P_SPINR(f),XP(G)::B(I)
        • R(f);P_SPINR(e),XP(H)::B(I),XP(h)
        • S(c);::B(I),XP(h)
      • Refutation
        • Q(a);CHECK,XP(G)
    • Try
      • S(A);CHECK,XP(b)
      • Vars
        • K(d);P-FLIGHT::S(K)
      • Refutation
        • Q(a);XS(A)
    • Try
      • S(A);CHECK
      • Vars
        • K(d);P-FLIGHT::S(K)
      • Refutation
        • R(e);P_SPINR(f),XS(A)
    • Try
      • B(I);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::B(I),XS(i)
      • Refutation
        • S(i);XB(I)
  • Actual
    • S(K);XP(h)
    • Threat
      • S(K)
    • Vars
      • R(f);P_SPINR(e),XP(H)::S(K)
      • S(i);N_GUARD,SBLOCK,XS(K)::B(I)
      • Q(a);N_GUARD,P_PINS(K),SBLOCK::S(A),XP(b)
      • Q(a);N_GUARD,P_PINS(K)::R1(C)
      • R(e);N_GUARD,P_PINS(K),SBLOCK::S(A)
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