MESON Chess Problem Database

Problem Display
PID: 187777 (1n2qrn1/5p2/rp3p1p/3N1N1K/B1kP4/2p2P2/8/3Q4 w - - 0 1)

Marin y Llovet, Valentin

Deutsche Schachzeitung, 1909

1n2qrn1/5p2/rp3p1p/3N1N1K/B1kP4/2p2P2/8/3Q4

#2

7 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qb3#
    • 1...Qb5
      • 2.Sfe3#
    • 1...Qc6
      • 2.Sfe3#
    • 1...Qd7
      • 2.Sfe3#
    • 1...Qe3
      • 2.Sfxe3#
    • 1...Qc8
      • 2.Sfe3#
    • 1...Qd8
      • 2.Sfe3#
    • 1...Se7
      • 2.Sfe3#
    • 1...b5
      • 2.Bb3#
  • Tries
    • 1.Bb5+?
      • 1...Kxd5
        • 2.Qb3#
      • 1...Qxb5
        • 2.Sfe3#
      • 1...Kxb5!
    • 1.Qe2+?
      • 1...Kxd5
        • 2.Qa2#
      • 1...Qxe2!
  • Keys
    • 1.Qb1!
      • 1...Kxd5
        • 2.Qa2#
        • 2.Qb3#
      • 1...Qxa4
        • 2.Sde3#
      • 1...Rxa4
        • 2.Sxb6#
      • 1...c2
        • 2.Qb3#
      • 1...Qb5
        • 2.Sde3#
        • 2.Qxb5#
      • 1...Qc6
        • 2.Sde3#
      • 1...Qd7
        • 2.Sde3#
      • 1...Qe1
        • 2.Qb5#
      • 1...Qe2
        • 2.Qb5#
      • 1...Qe3
        • 2.Sdxe3#
        • 2.Qb5#
      • 1...Qe4
        • 2.Qb5#
      • 1...Qe5
        • 2.Qb5#
      • 1...Qe6
        • 2.Qb5#
      • 1...Qe7
        • 2.Qb5#
      • 1...Qc8
        • 2.Sde3#
        • 2.Qb5#
      • 1...Qd8
        • 2.Sde3#
        • 2.Qb5#
      • 1...Ra5
        • 2.Sxb6#
      • 1...Ra7
        • 2.Sxb6#
      • 1...Ra8
        • 2.Sxb6#
      • 1...Sc6
        • 2.Qb5#
      • 1...Sd7
        • 2.Qb5#
      • 1...Se7
        • 2.Sde3#
      • 1...b5
        • 2.Bb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 14
    • REMOVED MATES = 5
  • Sets
    • K(b);S_FLIGHT,XS(E)::QAB(A)
    • Q(i);N_GUARD::S(F)
    • Q(i);N_GUARD::S(F),XQ(i)
    • S(k);S_CUTQ(i)::S(F)
    • P(d);SBLOCK::B(C)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(A)
        • Q(i);SBLOCK,XB(C)::S(F)
      • Refutation
        • K(b);S_FLIGHT,XB(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB(A)
      • Refutation
        • Q(i);P_PINP(B),XQ(A)
  • Actual
    • Q(A);
    • Vars
      • Q(i);N_GUARD,XB(C)::S(E)
      • R(c);N_GUARD,XB(C)::S(E),XP(d)
      • P(a);::QAB1(A)
      • Q(i);N_GUARD::S(E)
      • Q(i);N_GUARD::QAB1(A)
      • Q(i);N_GUARD,P_PINP(B)::QAB1(A)
      • Q(i);N_GUARD,P_PINS(F)::QAB1(A)
      • R(c);N_GUARD::S(E),XP(d)
      • S(h);S_CUTQ(i)::QAB1(A)
      • S(k);S_CUTQ(i)::S(E)
      • P(d);SBLOCK::B(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).