MESON Chess Problem Database

Problem Display
PID: 266613 (QN2n2B/3n4/4p3/4pp2/1P1kr1p1/pP2pR2/r1P1PP2/bb1N1K1B w - - 0 1)

Dyachuk, Vasyl Vasilovich

Slesarenko, Anatoly Vasilevich

1/2 Prize, Pat a Mat, 2017

QN2n2B/3n4/4p3/4pp2/1P1kr1p1/pP2pR2/r1P1PP2/bb1N1K1B

#2

12 + 13

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.c3#
    • 1...Rf4
      • 2.Rxf4#
      • 2.fxe3#
    • 1...exf2
      • 2.Rd3#
  • Tries
    • 1.Qd5+?
      • 1...exd5
        • 2.Sc6#
      • 1...Kxd5!
    • 1.Qc6?
      • threat
        • 2.Qc4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb6
        • 2.Qc5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Rxc2!
    • 1.Qa5?
      • threat
        • 2.Sc6#
      • 1...Sxb8
        • 2.Qc5#
      • 1...Rf4
        • 2.Rxf4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Rxc2!
    • 1.Qa6?
      • threat
        • 2.Qd3#
        • 2.Qc4#
      • 1...Rxc2
        • 2.Qd3#
      • 1...Bxc2
        • 2.Qc4#
      • 1...Sc5
        • 2.Qc4#
      • 1...Sb6
        • 2.Qd3#
      • 1...Sd6
        • 2.Qd3#
        • 2.Qxd6#
      • 1...Kd5!
    • 1.c4?
      • threat
        • 2.Sc6#
      • 1...Sxb8
        • 2.Qa7#
      • 1...Rf4
        • 2.fxe3#
      • 1...Rxe2!
  • Keys
    • 1.Rf4!
      • threat
        • 2.fxe3#
      • 1...Rxf4
        • 2.Sc6#
      • 1...exf2
        • 2.e3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(c);S_CUTB(a)::P(D)
    • P(e);OGATE,XP(F)::R1(H)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • P(k);SBLOCK,XQ(J)::S(K)
      • Refutation
        • K(f);N_SPINP(i),P-FLIGHT,XQ(J)
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • S(l);N_GUARD::QAB1(J),XS(l)
        • S(l);N_GUARD::QAB1(J)
        • S(m);N_GUARD::QAR2(J),XS(m)
      • Refutation
        • R(c);XP(D)
    • Try
      • Q(J);
      • Threat
        • S(K)
      • Vars
        • S(l);N_GUARD,XS(K)::QAB1(J)
        • R(g);OGATEB::R(H),XR(g)
        • S(l);N_GUARD::QAB1(J),XS(l)
      • Refutation
        • R(c);XP(D)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XP(D)::QAR1(J)
        • B(b);XP(D)::QAR1(J)
        • S(l);::QAR1(J)
      • Refutation
        • K(f);N_SPINP(i),P-FLIGHT
    • Try
      • P(D);
      • Threat
        • S(K)
      • Vars
        • S(l);N_GUARD,XS(K)::QAB(J)
        • R(g);N_GUARD::P(F),XP(e)
      • Refutation
        • R(c);XP(E)
  • Actual
    • R(H);P_PINR(g)
    • Threat
      • P(F),XP(e)
    • Vars
      • R(g);N_SPINR(g),P_PINP(F),XR(H)::S(K)
      • P(e);OGATE,XP(F)::P(E)
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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).