MESON Chess Problem Database

Problem Display
PID: 64641 (BK2nR2/B1Pb4/PR2P3/N1k4q/pp1p2p1/7p/3P3Q/8 w - - 0 1)

Rudenko, Valentin Fedorovich

3rd Prize, Probleemblad, 1980

BK2nR2/B1Pb4/PR2P3/N1k4q/pp1p2p1/7p/3P3Q/8

#2

11 + 9

3752 FIDE Album (1980-1982) 1988

SOLUTION

  • SOUND
  • Sets
    • 1...Qg6
      • 2.Qe5#
    • 1...Qf7
      • 2.Qe5#
    • 1...Qh4
      • 2.Rf5#
      • 2.Qe5#
    • 1...Qd5
      • 2.Rb7#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qf5
      • 2.Rxf5#
    • 1...Qh6
      • 2.Rf5#
      • 2.Qe5#
    • 1...Qh7
      • 2.Qe5#
    • 1...Bb5
      • 2.Rd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sf6
      • 2.Qd6#
    • 1...Sxc7
      • 2.Qd6#
    • 1...Sg7
      • 2.Qd6#
    • 1...b3
      • 2.Rxb3#
    • 1...d3
      • 2.Qg1#
      • 2.Qf2#
  • Tries
    • 1.Bh1?
      • threat
        • 2.Rb7#
      • 1...Qe5
        • 2.Qxe5#
      • 1...g3!
    • 1.Bg2?
      • threat
        • 2.Rb7#
      • 1...hxg2
        • 2.Qxh5#
      • 1...Qe5
        • 2.Qxe5#
      • 1...g3!
    • 1.Be4?
      • threat
        • 2.Rb7#
      • 1...Qe5
        • 2.Qxe5#
      • 1...g3!
    • 1.Rc6+?
      • 1...Kd5
        • 2.Rd6#
      • 1...Kb5!
    • 1.Qe2?
      • threat
        • 2.Qc4#
      • 1...Bxe6
        • 2.Rxe6#
        • 2.Qb5#
      • 1...d3
        • 2.Qf2#
        • 2.Qe3#
      • 1...Qd5
        • 2.Rc6#
      • 1...Bb5
        • 2.Qxb5#
      • 1...Sd6
        • 2.Rb5#
      • 1...Bc6!
    • 1.c8Q+?
      • 1...Bc6
        • 2.Qxc6#
      • 1...Sc7
        • 2.Qd6#
      • 1...Bxc8!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qc1#
      • 1...Bxe6
        • 2.Qc6#
      • 1...Bc6
        • 2.Qxc6#
      • 1...d3
        • 2.Qg1#
      • 1...Qg6
        • 2.Qd5#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Qh7
        • 2.Qd5#
      • 1...Bb5
        • 2.Rc6#
      • 1...Sd6
        • 2.Rb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(g);N_GUARD::QAR2(B)
    • Q(g);SBLOCK::B(G)+R(E)
    • Q(g);N_GUARD,P_PINP(H)::QAR2(B),XQ(g)
    • Q(g);N_GUARD::R(K),XQ(g)
    • B(h);SBLOCK::B(G)+R(E)
    • S(i);N_GUARD::QAB1(B),XS(i)
    • S(i);N_GUARD::QAB1(B)
    • S(i);N_GUARD,XP(H)::QAB1(B)
    • P(c);OGATE::B(G)+R(E),XP(c)
  • Tries
    • Try
      • B(I);
      • Threat
        • B(G)+R(E)
      • Vars
        • Q(g);N_GUARD,P_PINP(H)::QAR2(B),XQ(g)
      • Refutation
        • P(e);
    • Try
      • B(I);
      • Threat
        • B(G)+R(E)
      • Vars
        • P(a);OGATE,XB(I)::QAR(B),XQ(g)
        • Q(g);N_GUARD,P_PINP(H)::QAR2(B),XQ(g)
      • Refutation
        • P(e);
    • Try
      • B(I);
      • Threat
        • B(G)+R(E)
      • Vars
        • Q(g);N_GUARD,P_PINP(H)::QAR2(B),XQ(g)
      • Refutation
        • P(e);
    • Try
      • R(E);CHECK
      • Vars
        • K(f);P-FLIGHT::B(I)+R(E),DCHECK
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • Q(g);SBLOCK::B(G)+R(E),DCHECK
        • B(h);N_GUARD::QAR1(B),XB(h)
        • S(i);SBLOCK::B(G)+R(E),DCHECK
      • Refutation
        • B(h);
    • Try
      • P(H);CHECK
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR1(H),XB(h)
        • S(i);P_SPINS(i)::QAB1(B)
      • Refutation
        • B(h);XQ(H)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • B(h);N_GUARD,XP(F)::QAR1(B)
      • B(h);N_GUARD::QAR1(B),XB(h)
      • P(d);OGATEB::QAB(B)
      • Q(g);N_GUARD::QAR1(B)
      • Q(g);N_GUARD::QAR1(B),XQ(g)
      • Q(g);N_GUARD::R(K),XQ(g)
      • B(h);SBLOCK::B(G)+R(E),DCHECK
      • S(i);SBLOCK::B(G)+R(E)
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