MESON Chess Problem Database

Problem Display
PID: 262000 (3R3Q/7b/1P2P3/bK1Nr3/3k1P2/2ppRn2/2P2n2/8 w - - 0 1)

Somma, Francesco

L'Echiquier, 1927

3R3Q/7b/1P2P3/bK1Nr3/3k1P2/2ppRn2/2P2n2/8

#2

9 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Rxd3#
    • 1...Se1
      • 2.Qxe5#
    • 1...Sg1
      • 2.Qxe5#
    • 1...Sd2
      • 2.Qxe5#
    • 1...Sh2
      • 2.Qxe5#
    • 1...Sh4
      • 2.Qxe5#
    • 1...Sg5
      • 2.Qxe5#
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qc5#
      • 1...Rxe3
        • 2.Sf6#
      • 1...Bxb6
        • 2.Qb4#
      • 1...Bb4
        • 2.Qxb4#
      • 1...Se4
        • 2.Rxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD,SBLOCK,S_CUTB(h)::R1(B),XP(c)
    • S(d);N_GUARD::QAB1(I),XR(g)
  • Actual
    • Q(I);N_PINR(g)
    • Threat
      • QAB1(I)
    • Vars
      • R(g);N_PINS(E),SBLOCK,XR(B)::R(H)+S(E)
      • B(f);N_GUARD,XP(F)::QAR2(I)
      • B(f);N_GUARD::QAR2(I),XB(f)
      • S(a);N_GUARD,SBLOCK,S_CUTB(h)::R1(B),XP(c)
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