MESON Chess Problem Database

Problem Display
PID: 194736 (B4QK1/p2p4/Rn1Np3/P1kp3R/5p1b/rbPpr1n1/1P5B/2N5 w - - 0 1)

Magini, Fabio

Best Problems, 2019

B4QK1/p2p4/Rn1Np3/P1kp3R/5p1b/rbPpr1n1/1P5B/2N5

#2

11 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sxb3#
    • 1...Ra2
      • 2.Sxb3#
    • 1...Ra4
      • 2.Sxb3#
    • 1...Rxa5
      • 2.Sxb3#
      • 2.Rxa5#
    • 1...Re1
      • 2.Sxd3#
    • 1...Re2
      • 2.Sxd3#
    • 1...Re4
      • 2.Sxd3#
    • 1...Re5
      • 2.Sxd3#
    • 1...Bd1
      • 2.b4#
    • 1...Ba2
      • 2.b4#
    • 1...Bc2
      • 2.b4#
    • 1...Ba4
      • 2.b4#
    • 1...Bc4
      • 2.b4#
    • 1...Sa4
      • 2.Qc8#
    • 1...Sc4
      • 2.Qc8#
    • 1...Sc8
      • 2.Qxc8#
  • Tries
    • 1.Se4+?
      • 1...Kc4
        • 2.Qb4#
        • 2.Qc5#
      • 1...Kb5!
    • 1.Sb7+?
      • 1...Kc4
        • 2.Qb4#
        • 2.Qc5#
      • 1...Kc6
        • 2.Qc5#
      • 1...Kb5!
    • 1.Bg1?
      • threat
        • 2.Sxd3#
      • 1...Bc2
        • 2.b4#
      • 1...Bc4
        • 2.b4#
      • 1...d2
        • 2.Sd3#
      • 1...Be7!
    • 1.Qb8?
      • threat
        • 2.Qc7#
      • 1...Sxa8
        • 2.Qb4#
        • 2.Qb5#
      • 1...Ba4
        • 2.b4#
      • 1...Bd8!
  • Keys
    • 1.Qxf4!
      • threat
        • 2.Qb4#
      • 1...Ra4
        • 2.Sxb3#
      • 1...Re4
        • 2.Sxd3#
      • 1...Bc4
        • 2.b4#
      • 1...Se4
        • 2.Qxe3#
      • 1...Sc4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • R(a);N_GUARD::S(A),XB(b)
    • R(d);N_GUARD::S(A),XP(c)
    • R(d);N_GUARD,N_SPINP(i)::S(A),XP(c)
    • B(b);OGATE::P(B)
    • S(j);N_GUARD::QAR(J)
    • S(j);N_GUARD::QAR(J),XS(j)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(h);N_SPINP(i),P-FLIGHT,P_SPINS(j)::QAR1(J)
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • B(C);P_PINR(d)
      • Threat
        • S(A),XP(c)
      • Vars
        • B(b);OGATE::P(B)
        • P(c);::S(A)
      • Refutation
        • B(g);
    • Try
      • Q(J);
      • Threat
        • QAR2(J)
      • Vars
        • B(b);OGATE::P(B)
      • Refutation
        • B(g);
  • Actual
    • Q(J);XP(f)
    • Threat
      • QAB1(J)
    • Vars
      • R(a);N_GUARD::S(A),XB(b)
      • R(d);N_GUARD::S(A),XP(c)
      • B(b);OGATE::P(B)
      • S(e);::QAB(J),XR(d)
      • S(j);::QAB1(J)
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