MESON Chess Problem Database

Problem Display
PID: 201460 (3N2n1/1Q3b2/2R5/3B1kP1/3bqp2/5NpK/8/8 w - - 0 1)

Marin y Llovet, Valentin

1st Prize, Kagans Neueste Schachnachrichten, 1922

3N2n1/1Q3b2/2R5/3B1kP1/3bqp2/5NpK/8/8

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qxb1#
    • 1...Bxd5
      • 2.Qh7#
    • 1...Be6
      • 2.Qh7#
  • Tries
    • 1.Sxf7?
      • threat
        • 2.Sh4#
      • 1...Qxf3
        • 2.Qc8#
        • 2.Qd7#
      • 1...Qxd5!
    • 1.Be6+?
      • 1...Kg6
        • 2.Qxf7#
      • 1...Bxe6
        • 2.Qh7#
      • 1...Qxe6!
    • 1.Rf6+?
      • 1...Bxf6
        • 2.Bxe4#
      • 1...Sxf6!
    • 1.Qd7+?
      • 1...Be6
        • 2.Qh7#
      • 1...Qe6!
    • 1.Qxf7+?
      • 1...Bf6
        • 2.Qh7#
      • 1...Sf6!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Bxe4#
      • 1...Kg6
        • 2.Qxf7#
      • 1...Qxf3
        • 2.Be4#
      • 1...Qxd5
        • 2.Qb1#
      • 1...Bxd5
        • 2.Qh7#
      • 1...Qb1
        • 2.Be4#
        • 2.Qxb1#
      • 1...Qc2
        • 2.Be4#
      • 1...Qd3
        • 2.Be4#
      • 1...Qe1
        • 2.Be4#
      • 1...Qe2
        • 2.Be4#
      • 1...Qe3
        • 2.Be4#
      • 1...Qe5
        • 2.Be4#
      • 1...Qe6
        • 2.Be4#
      • 1...Qe7
        • 2.Be4#
      • 1...Qe8
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 2
  • Sets
    • Q(c);OGATEB::QAB(F),XQ(c)
    • B(f);OGATE,XB(C)::QAB(F)
    • B(f);OGATE::QAB(F)
  • Tries
    • Try
      • S(G);XB(f)
      • Threat
        • S(A)
      • Refutation
        • Q(c);XB(C)
    • Try
      • B(C);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(F),XB(f)
        • B(f);OGATE,XB(C)::QAB(F)
      • Refutation
        • Q(c);XB(C)
    • Try
      • R(E);CHECK
      • Vars
        • B(b);XR(E)::B(C),XQ(c)
      • Refutation
        • S(g);XR(E)
    • Try
      • Q(F);CHECK
      • Vars
        • B(f);OGATE,P_SPINB(f)::QAB(F)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • Q(F);CHECK,XB(f)
      • Vars
        • B(b);P_SPINB(b)::QAB(F)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • R(E);
    • Threat
      • R(E)+B(C),DCHECK,XQ(c)
    • Vars
      • K(e);S_FLIGHT::QAB1(F),XB(f)
      • Q(c);XS(A)::R(E)+B(C),DCHECK
      • Q(c);OGATEB,P_SPINQ(c),XB(C)::QAB(F)
      • B(f);OGATE,P_SPINB(f),XB(C)::QAB(F)
      • Q(c);::R(E)+B(C),DCHECK
      • Q(c);::B(C)
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