MESON Chess Problem Database

Problem Display
PID: 204368 (b7/q1p1Q2K/3p2p1/p7/N1p4B/1p6/3kP1R1/1B2R3 w - - 0 1)

Mari, Alberto

La Sacchierra Enigmistica, 1925

b7/q1p1Q2K/3p2p1/p7/N1p4B/1p6/3kP1R1/1B2R3

#2

8 + 9

5454 Near Snap 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb8
      • 2.Qg5#
      • 2.e4#
    • 1...Qa6
      • 2.Qg5#
      • 2.e4#
    • 1...Qb7
      • 2.Qg5#
      • 2.e4#
    • 1...d5
      • 2.e3#
    • 1...c5
      • 2.e4#
    • 1...c6
      • 2.e3#
  • Tries
    • 1.Qxd6+?
      • 1...Ke3
        • 2.Bf2#
        • 2.Bg5#
      • 1...Qd4
        • 2.Qxd4#
        • 2.e4#
      • 1...Bd5
        • 2.e3#
      • 1...cxd6+!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qc3#
      • 1...Ke3
        • 2.Bg5#
      • 1...Qe3
        • 2.Qb2#
      • 1...Qd4
        • 2.Qxd4#
      • 1...c3
        • 2.Qxc3#
      • 1...c5
        • 2.e4#
      • 1...c6
        • 2.e3#

This anticipates 686(1933), 160588(1952)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(e);S_CUTB(i)::R(D)+P(C)
    • P(h);P_PINQ(G),S_CUTQ(g)::R(D)+P(C)
    • P(h);P_PINQ(G),S_CUTB(i)::R(D)+P(C)
  • Tries
    • Try
      • Q(G);CHECK,XP(e)
      • Vars
        • B(i);P_SPINB(i)::R(D)+P(C)
      • Refutation
        • P(h);CHECK,XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • K(a);S_FLIGHT::B(F)
      • Q(g);SBLOCK::QAR2(G)
      • Q(g);N_GUARD::QAR2(G),XQ(g)
      • P(c);::QAB1(G),XP(c)
      • P(h);P_PINQ(G),S_CUTQ(g)::R(D)+P(C)
      • P(h);P_PINQ(G),S_CUTB(i)::R(D)+P(C)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).