MESON Chess Problem Database

Problem Display
PID: 198663 (1q2r2r/p5Q1/5R1p/3bB2N/1p6/2N1k1b1/4B2n/2K5 w - - 0 1)

Marin y Llovet, Valentin

1st Prize, Kagans Neueste Schachnachrichten, 1921

1q2r2r/p5Q1/5R1p/3bB2N/1p6/2N1k1b1/4B2n/2K5

#2

7 + 10

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Qg1#
    • 1...Bxe5
      • 2.Qg1#
  • Tries
    • 1.Rf3+?
      • 1...Bxf3
        • 2.Bd4#
      • 1...Sxf3!
    • 1.Qxh6+?
      • 1...Bf4
        • 2.Qxf4#
      • 1...Rxh6!
    • 1.Qxg3+?
      • 1...Bf3
        • 2.Qg1#
      • 1...Sf3!
    • 1.Qg5+?
      • 1...Bf4
        • 2.Qxf4#
        • 2.Qg1#
      • 1...hxg5!
    • 1.Qxa7+?
      • 1...Qb6
        • 2.Qxb6#
      • 1...Qxa7!
  • Keys
    • 1.Re6!
      • threat
        • 2.Bd4#
      • 1...Kf2
        • 2.Qxg3#
      • 1...Qxe5
        • 2.Qxa7#
      • 1...Bxe5
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(c);OGATE::QAB(G)
    • B(c);OGATE,XB(D)::QAB(G)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • B(e);XR(F)::B(D)
      • Refutation
        • S(a);XR(F)
    • Try
      • Q(G);CHECK,XP(f)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(G),XB(c)
      • Refutation
        • R(j);XQ(G)
    • Try
      • Q(G);CHECK,XB(c)
      • Vars
        • B(e);P_SPINB(e)::QAB(G)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(G);CHECK
      • Refutation
        • P(f);XQ(G)
    • Try
      • Q(G);CHECK,XP(g)
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::QAB(G),XQ(h)
      • Refutation
        • Q(h);XQ(G)
  • Actual
    • R(F);
    • Threat
      • R(F)+B(D),DCHECK
    • Vars
      • K(b);S_FLIGHT::QAB1(G),XB(c)
      • Q(h);N_GUARD,P_SPINQ(h),XB(D)::QAB(G),XP(g)
      • B(c);OGATE,P_SPINB(c),XB(D)::QAB(G)
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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).