MESON Chess Problem Database

Problem Display
PID: 15613 (8/p2Kp1p1/4p2p/3kpn1Q/R6p/1PPN2bb/8/6Bq w - - 0 1)

Rychkov, Vladimir Nikolaevich

2nd Prize, Lvovskaya Pravda, 1986

8/p2Kp1p1/4p2p/3kpn1Q/R6p/1PPN2bb/8/6Bq

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Ra5#
    • 1...Se3
      • 2.Rd4#
    • 1...Sd4
      • 2.Rxd4#
    • 1...Sd6
      • 2.Rd4#
    • 1...e4
      • 2.Rd4#
      • 2.Ra5#
      • 2.c4#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Sb4#
      • 1...Sd4
        • 2.Rxd4#
      • 1...e4
        • 2.Rd4#
        • 2.Rc5#
      • 1...a5!
    • 1.Qe2?
      • threat
        • 2.Sb4#
        • 2.Ra5#
        • 2.c4#
      • 1...Qxg1
        • 2.Qe4#
      • 1...Qe4
        • 2.Ra5#
        • 2.Qxe4#
      • 1...Bf2
        • 2.Qxe5#
      • 1...Sd4
        • 2.c4#
      • 1...Sd6
        • 2.Sb4#
      • 1...e4
        • 2.Ra5#
        • 2.c4#
      • 1...a5
        • 2.Rxa5#
        • 2.c4#
      • 1...Se3!
    • 1.Qf3+?
      • 1...e4
        • 2.Ra5#
        • 2.c4#
      • 1...Qxf3!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qxe6#
      • 1...Se3
        • 2.Ra5#
      • 1...Sd4
        • 2.c4#
      • 1...Sd6
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(a);SBLOCK::R(E)
    • S(g);N_GUARD,P_SPINP(f)::R1(E)
    • S(g);N_GUARD,P_SPINP(f)::R1(E),XS(g)
  • Tries
    • Try
      • R(E);
      • Threat
        • S(D)
      • Vars
        • S(g);N_GUARD,P_SPINP(f)::R1(E),XS(g)
      • Refutation
        • P(j);
    • Try
      • Q(F);
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);N_GUARD,XB(A)::QAB1(F)
        • B(b);N_GUARD::QAR1(F),XP(f)
        • S(g);::P(C)
        • S(g);::S(D)
      • Refutation
        • S(g);
    • Try
      • Q(F);CHECK
      • Refutation
        • Q(a);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB1(F),XP(h)
    • Vars
      • S(g);::R(E)
      • S(g);::P(C)
      • S(g);::S(D)
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