MESON Chess Problem Database

Problem Display
PID: 198741 (5K2/1BBRNR2/3b4/2P5/3P1p2/1n2k2p/2P1p2P/4Q1n1 w - - 0 1)

Mari, Alberto

In Tramway (Lo Scacchista), 1921

5K2/1BBRNR2/3b4/2P5/3P1p2/1n2k2p/2P1p2P/4Q1n1

#2

11 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc5
      • 2.Bxf4#
    • 1...Be5
      • 2.Sf5#
    • 1...Bxc7
      • 2.Sf5#
    • 1...Bxe7+
      • 2.Rfxe7#
    • 1...Sd2
      • 2.Qxg1#
  • Tries
    • 1.Bxd6?
      • threat
        • 2.Sf5#
        • 2.Bxf4#
      • 1...Sxd4
        • 2.Bxf4#
      • 1...f3
        • 2.Sf5#
        • 2.Bf4#
      • 1...Kxd4!
  • Keys
    • 1.Rxf4!
      • 1...Bxe7+
        • 2.Rxe7#
      • 1...Kxf4
        • 2.Qg3#
      • 1...Bxf4
        • 2.Sf5#
      • 1...Bxc5
        • 2.Qc3#
      • 1...Bxc7
        • 2.Sd5#
      • 1...Sxd4
        • 2.Qc1#
      • 1...Sxc5
        • 2.Qc1#
      • 1...Be5
        • 2.Sd5#
      • 1...Sf3
        • 2.Re4#
      • 1...Sa1
        • 2.Qc1#
      • 1...Sc1
        • 2.Qxc1#
      • 1...Sd2
        • 2.Qf2#
      • 1...Sa5
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(g);OGATE,XP(E)::B(G),XP(f)
    • B(g);N_PINS(I)::S(I)
    • B(g);N_PINS(I),XB(G)::S(I)
    • B(g);CHECK,OGATE,XS(I)::R(J),XB(g)
    • S(c);SBLOCK::QAB(A),XS(a)
  • Tries
    • Try
      • B(G);N_SPINS(I),XB(g)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XP(D)::B(G),XP(f)
      • Refutation
        • K(d);N_SPINP(b),S_FLIGHT,XP(D)
  • Actual
    • R(J);XP(f)
    • Vars
      • B(g);CHECK,OGATE,XS(I)::R(H),XB(g)
      • K(d);N_SPINP(b),P_SPINB(g),S_FLIGHT,XR(J)::QAB1(A)
      • B(g);N_PINS(I),XR(J)::S(I)
      • B(g);XP(E)::QAR2(A)
      • B(g);N_PINS(I),XB(G)::S(I)
      • S(c);N_GUARD,XP(D)::QAB(A)
      • S(c);N_GUARD,XP(E)::QAB(A)
      • B(g);N_PINS(I)::S(I)
      • S(a);SBLOCK::R1(J)
      • S(c);N_GUARD::QAB(A)
      • S(c);N_GUARD::QAB(A),XS(c)
      • S(c);SBLOCK::QAB1(A)
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