MESON Chess Problem Database

Problem Display
PID: 7616 (3Q4/1p6/4P1p1/N3k1N1/1P2Bp2/K1Rpqp2/1n6/4R3 w - - 0 1)

Sushkov, Yuri Akimovich

1st HM., Buletin Problemistic TT, 1993

3Q4/1p6/4P1p1/N3k1N1/1P2Bp2/K1Rpqp2/1n6/4R3

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Rc5#
    • 1...Qc5
      • 2.Rxc5#
    • 1...Qxe1
      • 2.Rc5#
    • 1...Qe2
      • 2.Rc5#
    • 1...Qxe4
      • 2.Rc5#
    • 1...Sd1
      • 2.Sc4#
    • 1...Sa4
      • 2.Sc4#
    • 1...Sc4+
      • 2.Sxc4#
    • 1...b5
      • 2.Sc6#
    • 1...b6
      • 2.Sc6#
  • Tries
    • 1.Bxd3?
      • threat
        • 2.Rc5#
      • 1...Sc4+
        • 2.Sxc4#
      • 1...Sa4
        • 2.Sc4#
      • 1...b6
        • 2.Sc6#
      • 1...Sxd3!
    • 1.Bxg6?
      • threat
        • 2.Rc5#
      • 1...Sc4+
        • 2.Sxc4#
      • 1...Sa4
        • 2.Sc4#
      • 1...b6
        • 2.Sc6#
      • 1...d2!
    • 1.Rxe3?
      • threat
        • 2.Rc5#
      • 1...Sc4+
        • 2.Sxc4#
      • 1...Sa4
        • 2.Sc4#
      • 1...b6
        • 2.Sc6#
      • 1...fxe3!
    • 1.Rc6?
      • threat
        • 2.Qh8#
      • 1...Sc4+
        • 2.Sxc4#
      • 1...Qxe4
        • 2.Rc5#
      • 1...bxc6
        • 2.Sxc6#
      • 1...d2+!
    • 1.Qf6+?
      • 1...Kd6
        • 2.Sxb7#
        • 2.Sf7#
      • 1...Kxf6!
    • 1.Qc7+?
      • 1...Kd4
        • 2.Sb3#
        • 2.Qc5#
        • 2.Qg7#
      • 1...Kf6!
    • 1.Qb8+?
      • 1...Kd4
        • 2.Qh8#
      • 1...Kf6!
  • Keys
    • 1.Rxd3!
      • threat
        • 2.Qh8#
      • 1...Qxd3+
        • 2.Bxd3#
      • 1...Sc4+
        • 2.Sxc4#
      • 1...Qxe4
        • 2.Rd5#
      • 1...Sxd3
        • 2.Sc4#
      • 1...Qd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::R(C)
    • Q(c);N_GUARD,P_PINP(D)::R(C),XQ(c)
    • Q(c);N_GUARD,XR(A)::R(C)
    • Q(c);N_GUARD,P_SPINQ(c),XB(E)::R(C)
    • S(a);N_GUARD::S(F)
    • S(a);CHECK,N_GUARD::S(F),XS(a)
    • P(h);N_GUARD::S(F)
  • Tries
    • Try
      • B(E);P_PINQ(c),XP(b)
      • Threat
        • R(C)
      • Vars
        • S(a);CHECK,N_GUARD::S(F),XS(a)
        • S(a);N_GUARD::S(F)
        • P(h);N_GUARD::S(F)
      • Refutation
        • S(a);XB(E)
    • Try
      • B(E);P_PINQ(c),XP(g)
      • Threat
        • R(C)
      • Vars
        • S(a);CHECK,N_GUARD::S(F),XS(a)
        • S(a);N_GUARD::S(F)
        • P(h);N_GUARD::S(F)
      • Refutation
        • P(b);P_PINR(C)
    • Try
      • R(A);XQ(c)
      • Threat
        • R(C)
      • Vars
        • S(a);CHECK,N_GUARD::S(F),XS(a)
        • S(a);N_GUARD::S(F)
        • P(h);N_GUARD::S(F)
      • Refutation
        • P(e);XR(A)
    • Try
      • R(C);
      • Threat
        • QAB(I)
      • Vars
        • S(a);CHECK,N_GUARD::S(F),XS(a)
        • Q(c);N_GUARD,P_SPINQ(c),XB(E)::R(C)
        • P(h);XR(C)::S(F),XP(h)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(I);CHECK
      • Refutation
        • K(f);S_FLIGHT,XQ(I)
    • Try
      • Q(I);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(I);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB(I)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • R(C);P_SPINR(C),XP(b)
    • Threat
      • QAB(I)
    • Vars
      • Q(c);CHECK,OGATE,XR(C)::R(A)+B(E),XQ(c)
      • S(a);CHECK,N_GUARD::S(F),XS(a)
      • Q(c);N_PINR(C),P_SPINQ(c),XB(E)::R1(C)
      • S(a);N_GUARD,XR(C)::S(F)
      • Q(c);N_GUARD,N_PINR(C)::QAB1(I),XQ(c)
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