MESON Chess Problem Database

Problem Display
PID: 46527 (1r3b2/B1N5/1p2p3/N1Rq4/1k2B1R1/1Pp4r/pP1Q4/K4b2 w - - 0 1)

Pilchenko, Viacheslav Karlovich

Shavirin, Valery Mikhailovich

Praca, 1999

1r3b2/B1N5/1p2p3/N1Rq4/1k2B1R1/1Pp4r/pP1Q4/K4b2

#2

10 + 10

4393 Uralski Problemist 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Qxc3#
    • 1...Rh2
      • 2.Qxc3#
    • 1...Rd3
      • 2.Sa6#
    • 1...Rh4
      • 2.Qxc3#
    • 1...Rh5
      • 2.Qxc3#
    • 1...Rh6
      • 2.Qxc3#
    • 1...Rh7
      • 2.Qxc3#
    • 1...Rh8
      • 2.Qxc3#
    • 1...Bg2
      • 2.Sa6#
    • 1...Bd3
      • 2.Qxc3#
    • 1...Ba6
      • 2.Sxa6#
  • Tries
    • 1.Bd3+?
      • 1...Qc4
        • 2.Sa6#
        • 2.Rgxc4#
        • 2.Rb5#
      • 1...Qe4
        • 2.Sa6#
        • 2.Rb5#
        • 2.Qxc3#
      • 1...Qd4
        • 2.Sa6#
        • 2.Rb5#
        • 2.Qxc3#
      • 1...Kxc5!
    • 1.Bf3+?
      • 1...Qc4
        • 2.Sa6#
        • 2.Rb5#
      • 1...Qe4
        • 2.Qxc3#
      • 1...Qd4
        • 2.Qxc3#
      • 1...Bc4
        • 2.Sa6#
      • 1...Kxc5!
    • 1.Bxd5+?
      • 1...Bc4
        • 2.Sa6#
        • 2.Rgxc4#
        • 2.Rb5#
      • 1...Kxc5!
    • 1.Qd4+?
      • 1...Qc4
        • 2.Sa6#
        • 2.Rb5#
      • 1...Bc4
        • 2.Sa6#
      • 1...Qxd4!
  • Keys
    • 1.Rxc3!
      • threat
        • 2.Rc4#
      • 1...Kxa5
        • 2.Rc5#
      • 1...Qxd2
        • 2.Sc6#
      • 1...Qxa5
        • 2.Bd3#
      • 1...Rxc3
        • 2.Qxc3#
      • 1...bxa5
        • 2.Rd3#
      • 1...Qc4
        • 2.Rxc4#
      • 1...Bc4
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 11
  • Sets
    • R(d);N_GUARD::QAB1(C),XP(c)
    • R(d);S_CUTB(a)::S(J)
    • B(a);N_GUARD::S(J)
    • B(a);S_CUTR(d)::QAB1(C),XP(c)
    • B(a);N_GUARD::S(J),XB(a)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • K(e);N_SPINP(c),P_SPINP(g),S_FLIGHT,XR(H)
    • Try
      • B(E);CHECK
      • Vars
        • Q(f);P_SPINQ(f)::QAB1(C),XP(c)
        • B(a);P_SPINB(a)::S(J)
      • Refutation
        • K(e);N_SPINP(c),P_SPINP(g),S_FLIGHT,XR(H)
    • Try
      • B(E);CHECK,XQ(f)
      • Refutation
        • K(e);N_SPINP(c),P_SPINP(g),S_FLIGHT,XR(H)
    • Try
      • Q(C);CHECK,N_PINP(c)
      • Vars
        • B(a);P_SPINB(a)::S(J)
      • Refutation
        • Q(f);XQ(C)
  • Actual
    • R(H);XP(c)
    • Threat
      • QAB(C)+R(H),DCHECK
    • Vars
      • K(e);S_FLIGHT,XS(G)::QAB(C)+R(H),DCHECK
      • Q(f);N_GUARD,XQ(C)::S(G)
      • Q(f);N_GUARD,SBLOCK,XS(G)::R(F)+B(E)
      • R(d);OGATE,P_SPINR(d),XR(H)::QAB1(C),XR(d)
      • P(g);SBLOCK,XS(G)::QAB(C)+R(H)
      • Q(f);::QAB(C)+R(H),DCHECK,XQ(f)
      • B(a);::QAB(C)+R(H),DCHECK,XB(a)
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