MESON Chess Problem Database

Problem Display
PID: 102479 (8/4p1P1/1pp1p2Q/nNk2b2/Pr3N1K/BP4n1/3R3p/4r2B w - - 0 1)

Mari, Alberto

L'Echiquier, 1928

8/4p1P1/1pp1p2Q/nNk2b2/Pr3N1K/BP4n1/3R3p/4r2B

#2

10 + 11

6490 yacpdb 2009
14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Sxe6#
    • 1...Bg4
      • 2.Sd3#
  • Tries
    • 1.Rc2+?
      • 1...Sc4
        • 2.Rxc4#
      • 1...Bxc2!
    • 1.Rd4?
      • threat
        • 2.Bxb4#
      • 1...Sc4
        • 2.Rxc4#
      • 1...cxb5!
    • 1.Qf6?
      • threat
        • 2.Qd4#
        • 2.Qxe7#
      • 1...Sxb3
        • 2.Qc3#
      • 1...Re4
        • 2.Qxe7#
      • 1...Re5
        • 2.Qxe5#
        • 2.Qxe7#
      • 1...Se2
        • 2.Qe5#
        • 2.Qxe7#
      • 1...Se4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sb7
        • 2.Qc3#
        • 2.Qd4#
      • 1...e5
        • 2.Qxe7#
      • 1...exf6!
  • Keys
    • 1.Qg5!
      • threat
        • 2.Qxe7#
      • 1...Sxb3
        • 2.Rc2#
      • 1...Se4
        • 2.Sxe6#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sb7
        • 2.Rc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(g);N_PINS(F)::S(F),XP(j)
    • B(g);N_PINS(F)::S(F)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • S(e);N_GUARD,N_PINS(F),P_SPINS(e)::R1(B),XS(e)
      • Refutation
        • B(g);XR(B)
    • Try
      • R(B);N_SPINS(F)
      • Threat
        • B(C),XR(d)
      • Vars
        • S(e);N_GUARD::R1(B),XS(e)
      • Refutation
        • P(i);XS(H)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);N_GUARD,XP(D)::QAR2(I)
        • R(a);::QAB(I),XP(k)
        • S(e);N_PINS(F)::QAB1(I)
        • P(j);::QAB(I),XP(k)
      • Refutation
        • P(k);XQ(I)
  • Actual
    • Q(I);P_PINB(g)
    • Threat
      • QAB(I),XP(k)
    • Vars
      • S(e);N_GUARD,XP(D)::R(B)
      • S(c);N_PINS(F)::S(F),XP(j)
      • S(e);N_PINS(F)::S(F)
      • S(e);N_GUARD::R(B)
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