MESON Chess Problem Database

Problem Display
PID: 8078 (8/2KR1P2/3Np2r/1Pp3BR/1PBkN3/1qr3p1/5b2/2Q5 w - - 0 1)

Lynn, David P

4th Prize=, Cross-Check, 1995

8/2KR1P2/3Np2r/1Pp3BR/1PBkN3/1qr3p1/5b2/2Q5

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bf6#
    • 1...Qd1
      • 2.Qxc3#
    • 1...Qa2
      • 2.Qxc3#
    • 1...Qa4
      • 2.Qxc3#
    • 1...Qb1
      • 2.Qxc3#
  • Tries
    • 1.Sf5+?
      • 1...Kxe4
        • 2.Qf4#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kxc4!
    • 1.Sb7+?
      • 1...Kxe4
        • 2.Qf4#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kxc4!
    • 1.Sc8+?
      • 1...Kxe4
        • 2.Qf4#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kxc4!
    • 1.Se8+?
      • 1...Kxe4
        • 2.Qf4#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kxc4!
    • 1.Bf6+?
      • 1...e5
        • 2.Bxe5#
      • 1...Rxf6!
    • 1.Qd2+?
      • 1...Ke5
        • 2.Bf4#
        • 2.Bf6#
        • 2.Bxh6#
      • 1...Rd3!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Sc4#
      • 1...Kxd3
        • 2.Qd2#
      • 1...Kd5
        • 2.Sc4#
      • 1...Ke5
        • 2.Bf6#
      • 1...Rxd3
        • 2.Qxc5#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Qd5
        • 2.Qxc3#
      • 1...Rc4
        • 2.Sxc4#
      • 1...c4
        • 2.Sxc4#
      • 1...e5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • K(e);S_FLIGHT::R(G)+B(F),DCHECK
    • Q(b);N_GUARD::QAB1(A),XR(c)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT,XS(D)::QAR1(A)
        • K(e);S_FLIGHT::QAB1(A)
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(c),XB(C)
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT,XS(D)::QAR1(A)
        • K(e);S_FLIGHT::QAB1(A)
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(c),XB(C)
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT,XS(D)::QAR1(A)
        • K(e);S_FLIGHT::QAB1(A)
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(c),XB(C)
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT,XS(D)::QAR1(A)
        • K(e);S_FLIGHT::QAB1(A)
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(c),XB(C)
    • Try
      • B(F);CHECK
      • Vars
        • P(g);P_SPINP(g)::B(F),XP(g)
      • Refutation
        • R(h);XB(F)
    • Try
      • Q(A);CHECK
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • B(C);
    • Threat
      • R(J)+S(H)
    • Vars
      • K(e);OGATEB,P-FLIGHT,XB(C)::QAR1(A)
      • K(e);P-FLIGHT::R(J)+S(H)
      • K(e);S_FLIGHT::R(G)+B(F),DCHECK
      • R(c);OGATE,SBLOCK,XB(C)::QAB1(A),XP(f)
      • Q(b);::R(J)+S(H),XQ(b)
      • Q(b);N_GUARD,SBLOCK::QAB1(A),XR(c)
      • R(c);::R(J)+S(H),XR(c)
      • P(f);::R(J)+S(H),XP(f)
      • P(g);SBLOCK::R(J)+S(H),DCHECK
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