MESON Chess Problem Database

Problem Display
PID: 222646 (2RR4/8/2n2P2/3N4/3P1P2/B1pk4/P1N3P1/1Q2K3 w - - 0 1)

Pradignat, Emile Leonard

100 des meilleurs problemes d'echecs (Pradignat), 1883

2RR4/8/2n2P2/3N4/3P1P2/B1pk4/P1N3P1/1Q2K3

#2

12 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd4
      • 2.Scb4#
  • Tries
    • 1.Scb4+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxd4!
    • 1.Sxc3?
      • 1...Kxc3
        • 2.Qb3#
      • 1...Sxd4
        • 2.Rxd4#
        • 2.Qd1#
      • 1...Sxd8
        • 2.Qd1#
      • 1...Sb4
        • 2.Qd1#
      • 1...Sa5
        • 2.Qd1#
      • 1...Se5
        • 2.Qd1#
        • 2.dxe5#
      • 1...Sa7
        • 2.Qd1#
      • 1...Se7
        • 2.Qd1#
      • 1...Sb8
        • 2.Qd1#
      • 1...Kc4!
    • 1.Qd1+?
      • 1...Kc4
        • 2.Qe2#
      • 1...Ke4!
    • 1.Qb5+?
      • 1...Kxc2
        • 2.Se3#
      • 1...Ke4!
  • Keys
    • 1.Qb7!
      • 1...Kxc2
        • 2.Qh7#
      • 1...Kc4
        • 2.Qa6#
      • 1...Ke4
        • 2.Qh7#
      • 1...Sxd4
        • 2.Sdb4#
      • 1...Sxd8
        • 2.Sdb4#
        • 2.Qh7#
      • 1...Sb4
        • 2.Sdxb4#
        • 2.Qh7#
      • 1...Sa5
        • 2.Sdb4#
        • 2.Qh7#
      • 1...Se5
        • 2.Sdb4#
      • 1...Sa7
        • 2.Sdb4#
        • 2.Qh7#
      • 1...Se7
        • 2.Sdb4#
      • 1...Sb8
        • 2.Sdb4#
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK,XP(G)::QAB(A)+S(D),DCHECK
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P_SPINS(c),S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,XP(G)
    • Try
      • S(I);XP(a)
      • Vars
        • K(b);OGATEB,P-FLIGHT,P_SPINS(c),XS(I)::QAR1(A)
        • S(c);XR(L)::QAR2(A)
        • S(c);::QAR2(A)
      • Refutation
        • K(b);P_SPINS(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P_SPINS(c),S_FLIGHT::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(D)::S(I)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT,XS(D)::QAB(A)
      • K(b);P_SPINS(c),S_FLIGHT::QAB(A)
      • K(b);S_FLIGHT::QAB(A)
      • S(c);N_GUARD,XP(G)::S(I)
      • S(c);N_GUARD::S(I)
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