MESON Chess Problem Database

Problem Display
PID: 268573 (8/2pB4/1pR3p1/b4p1b/5P2/N1Pk4/P5QK/1Rrr1NB1 w - - 0 1)

Lebedkin, Elisey K

Probleemblad, 1986

8/2pB4/1pR3p1/b4p1b/5P2/N1Pk4/P5QK/1Rrr1NB1

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb1
      • 2.Qc2#
    • 1...Rc2
      • 2.Qxc2#
    • 1...Be2
      • 2.Qd5#
    • 1...Bf3
      • 2.Qxf3#
    • 1...g5
      • 2.Bxf5#
  • Tries
    • 1.Rb2?
      • threat
        • 2.Qd5#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Rc2
        • 2.Qxc2#
      • 1...Rd2
        • 2.Rxd2#
      • 1...Bxc3!
    • 1.Rb5?
      • threat
        • 2.Rd5#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Bxc3!
    • 1.Rd6+?
      • 1...Kxc3
        • 2.Rb3#
        • 2.Qc6#
        • 2.Qb2#
      • 1...cxd6!
    • 1.Rxc7?
      • threat
        • 2.Bb5#
      • 1...Rxb1
        • 2.Qc2#
      • 1...Bf3
        • 2.Qxf3#
      • 1...b5
        • 2.Bxb5#
      • 1...Rxc3!
    • 1.Qh3+?
      • 1...Ke2
        • 2.Re6#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Ke4!
  • Keys
    • 1.Re6!
      • threat
        • 2.Re3#
      • 1...Kxc3
        • 2.Rb3#
      • 1...Rxc3
        • 2.Qd5#
      • 1...Bxc3
        • 2.Bb5#
      • 1...Re1
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD,XR(A)::QAB1(E)
    • R(a);N_GUARD,P_PINQ(E)::QAB1(E),XR(a)
    • B(f);SBLOCK::QAR2(E)
    • B(f);N_GUARD::QAR2(E),XB(f)
    • P(h);N_GUARD::B(K),XP(e)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAR2(E)
      • Vars
        • B(f);N_GUARD::QAR2(E),XB(f)
        • R(a);N_GUARD,P_PINQ(E)::QAB1(E),XR(a)
        • R(b);N_GUARD,P_PINQ(E)::R1(A),XR(b)
      • Refutation
        • B(d);XP(H)
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • B(f);N_GUARD::QAR2(E),XB(f)
      • Refutation
        • B(d);XP(H)
    • Try
      • R(J);CHECK
      • Refutation
        • P(i);XR(J)
    • Try
      • R(J);XP(i)
      • Threat
        • B(K)
      • Vars
        • R(a);N_GUARD,XR(A)::QAB1(E)
        • B(f);N_GUARD::QAR2(E),XB(f)
        • P(g);::B(K),XP(g)
      • Refutation
        • R(a);XP(H)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);S_CUTB(f),S_FLIGHT::R(J)
        • B(f);N_GUARD,P_SPINB(f)::QAR2(E),XB(f)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(J);
    • Threat
      • R1(J)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(H)::R1(A)
      • R(a);SBLOCK,XP(H)::QAR2(E)
      • B(d);SBLOCK,XP(H)::B(K)
      • R(b);N_GUARD::QAR1(E)
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