MESON Chess Problem Database

Problem Display
PID: 125672 (2n2B2/4r3/1R3N2/Ppk3p1/6p1/2P1n3/3NKQ2/6b1 w - - 0 1)

Kisis, Imants J

Latvian Championship, 1950

2n2B2/4r3/1R3N2/Ppk3p1/6p1/2P1n3/3NKQ2/6b1

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Qxe3#
    • 1...Sa7
      • 2.Bxe7#
  • Tries
    • 1.Kd3?
      • threat
        • 2.Sb3#
        • 2.Sde4#
      • 1...Sd6
        • 2.Sb3#
      • 1...Sxb6!
    • 1.Bxe7+?
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sxe7!
    • 1.Qf4?
      • threat
        • 2.Sb3#
        • 2.Qc7#
        • 2.Qb4#
        • 2.Qd4#
      • 1...Sd1+
        • 2.Qe5#
      • 1...Sf1+
        • 2.Qe5#
      • 1...Sc2+
        • 2.Qe5#
      • 1...Sg2+
        • 2.Qe5#
      • 1...Sc4+
        • 2.Sde4#
      • 1...Sd5+
        • 2.Sfe4#
      • 1...Sf5+
        • 2.Qe5#
      • 1...Sxb6
        • 2.Qc7#
      • 1...Bh2
        • 2.Sb3#
        • 2.Qxe3#
        • 2.Qb4#
        • 2.Qd4#
      • 1...Sd6
        • 2.Sb3#
        • 2.Qxd6#
        • 2.Qb4#
        • 2.Qd4#
      • 1...Sa7
        • 2.Sb3#
        • 2.Bxe7#
        • 2.Qd6#
        • 2.Qb4#
        • 2.Qd4#
      • 1...b4
        • 2.Sb3#
        • 2.Qc7#
        • 2.Qxb4#
        • 2.Qd4#
        • 2.cxb4#
      • 1...gxf4!
    • 1.Qf5+?
      • 1...Sd5+
        • 2.Sfe4#
      • 1...Sxf5+!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qc7#
      • 1...Sd1+
        • 2.Qe5#
      • 1...Sf1+
        • 2.Qe5#
      • 1...Sc2+
        • 2.Qe5#
      • 1...Sg2+
        • 2.Qe5#
      • 1...Sc4+
        • 2.Sde4#
      • 1...Sd5+
        • 2.Sfe4#
      • 1...Sf5+
        • 2.Qe5#
      • 1...Bh2
        • 2.Qxe3#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sa7
        • 2.Bxe7#
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAB(C),XS(b)
    • S(h);N_GUARD::B(H),XR(g)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(h);N_SPINR(g)::S(A)
      • Refutation
        • S(h);XR(F)
    • Try
      • B(H);CHECK,XR(g)
      • Vars
        • S(h);N_GUARD::B(H),XS(h)
      • Refutation
        • S(h);XB(H)
    • Try
      • Q(C);N_PINS(b)
      • Threat
        • DUALS(4)
      • Vars
        • S(b);CHECK,N_GUARD::QAR2(C)
        • S(b);CHECK,SBLOCK::S(A)
        • S(b);CHECK,SBLOCK::S(G)
        • S(h);XR(F)::QAR2(C)
      • Refutation
        • P(f);XQ(C)
    • Try
      • Q(C);CHECK,N_PINS(b)
      • Vars
        • S(b);CHECK,P_SPINS(b)::S(G)
      • Refutation
        • S(b);CHECK,XQ(C)
  • Actual
    • Q(C);N_PINS(b)
    • Threat
      • QAR2(C)
    • Vars
      • S(b);CHECK,N_GUARD::QAR2(C)
      • S(b);CHECK,SBLOCK::S(A)
      • S(b);CHECK,SBLOCK::S(G)
      • B(a);N_GUARD::QAB(C),XS(b)
      • S(h);N_GUARD,N_SPINR(g)::QAB1(C),XS(h)
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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).