MESON Chess Problem Database

Problem Display
PID: 29788 (7b/P2N3q/4Pp2/1BNk3p/r1p1R3/pnP3B1/Q7/1n4K1 w - - 0 1)

Antonov, Yuri Mikhailovich

Slesarenko, Anatoly Vasilevich

1st Prize, Sa Kommunism, 1990

7b/P2N3q/4Pp2/1BNk3p/r1p1R3/pnP3B1/Q7/1n4K1

#2

10 + 10

4827 FIDE Album (1989-1991) 1997
23 Die Schwalbe 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.a8Q#
      • 2.a8B#
    • 1...Sa1
      • 2.Rd4#
    • 1...Sc1
      • 2.Rd4#
    • 1...Sd2
      • 2.Rd4#
    • 1...Sd4
      • 2.Rxd4#
    • 1...Sa5
      • 2.Rd4#
  • Tries
    • 1.Bxc4+?
      • 1...Rxc4
        • 2.a8Q#
        • 2.a8B#
      • 1...Kc6!
    • 1.Qd2+?
      • 1...S3xd2
        • 2.Rd4#
      • 1...Sd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...S1xd2!
    • 1.Qf2?
      • threat
        • 2.Sb6#
      • 1...Qxd7
        • 2.Qf5#
      • 1...Sxc5
        • 2.Qd4#
      • 1...Sd4
        • 2.Rxd4#
        • 2.Qxd4#
      • 1...Ra6!
    • 1.Qg2?
      • threat
        • 2.Rd4#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Qxd7
        • 2.Rxc4#
      • 1...Sxc5
        • 2.Sb6#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Sxc3!
  • Keys
    • 1.Rxc4!
      • threat
        • 2.Sb6#
      • 1...Qxd7
        • 2.Qg2#
      • 1...Rxc4
        • 2.a8Q#
        • 2.a8B#
      • 1...Sxc5
        • 2.Rd4#
      • 1...Ra6
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD::P=Q
    • S(c);N_GUARD,P_SPINP(e)::R1(E)
    • S(c);N_GUARD,P_SPINP(e)::R1(E),XS(c)
  • Tries
    • Try
      • B(F);CHECK,XP(e)
      • Vars
        • R(d);XB(F)::P=Q
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • S(c);N_GUARD,XQ(B)::R1(E)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • S(J)
      • Vars
        • Q(i);N_GUARD,XS(J)::QAR2(B)
        • S(c);N_GUARD,XS(G)::QAR1(B)
      • Refutation
        • R(d);
    • Try
      • Q(B);
      • Threat
        • QAB(B)+R(E),DCHECK
      • Vars
        • Q(i);OGATE,P_SPINQ(i),XR(E)::QAB1(B),XQ(i)
        • Q(i);N_GUARD,XS(J)::QAB(B)+R(E),XP(e)
        • S(c);SBLOCK,XS(G)::S(J)
        • S(c);::QAB(B)+R(E),DCHECK,XS(c)
      • Refutation
        • S(a);XP(C)
  • Actual
    • R(E);XP(e)
    • Threat
      • S(J)
    • Vars
      • Q(i);N_GUARD,XS(J)::QAB(B)
      • R(d);N_GUARD,XR(E)::P=Q
      • S(c);XS(G)::QAB(B)+R(E),DCHECK
      • R(d);N_GUARD::R1(E)
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