MESON Chess Problem Database

Problem Display
PID: 15380 (8/2BK4/1r1pPp1b/R1N1P2p/2B2k1P/2P3n1/1rQP1NPP/5R2 w - - 0 1)

Cheylan, Yves

1st Place, French Championship, 1983-1984

8/2BK4/1r1pPp1b/R1N1P2p/2B2k1P/2P3n1/1rQP1NPP/5R2

#2

15 + 8

3748 FIDE Album (1983-1985) 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Sfd3#
      • 2.Scd3#
    • 1...Sxf1
      • 2.Qe4#
    • 1...Sh1
      • 2.Qe4#
    • 1...Se2
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sf5
      • 2.Scd3#
      • 2.Qe4#
    • 1...f5
      • 2.Scd3#
  • Tries
    • 1.Sd1+?
      • 1...Kxe5
        • 2.d4#
      • 1...Sxf1
        • 2.Qe4#
      • 1...Kg4!
    • 1.Sh1+?
      • 1...Kxe5
        • 2.d4#
      • 1...Sxf1
        • 2.Qe4#
      • 1...Kg4!
    • 1.Sh3+?
      • 1...Kxe5
        • 2.d4#
      • 1...Kg4!
    • 1.Sg4+?
      • 1...Sxf1
        • 2.Qe4#
      • 1...Kxg4!
    • 1.Qf5+?
      • 1...Sxf5
        • 2.Scd3#
      • 1...Kxf5!
    • 1.Qg6?
      • threat
        • 2.Sfd3#
        • 2.Scd3#
      • 1...Kxe5
        • 2.Sfd3#
        • 2.Scd3#
      • 1...dxc5
        • 2.Sd3#
        • 2.Sh3#
        • 2.hxg3#
      • 1...Bg5
        • 2.Scd3#
      • 1...Rxd2!
    • 1.hxg3+?
      • 1...Kxe5
        • 2.Sfd3#
        • 2.Scd3#
        • 2.Qe4#
        • 2.d4#
      • 1...Kxg3!
    • 1.exf6?
      • threat
        • 2.Scd3#
      • 1...Ke5
        • 2.Sfd3#
      • 1...R6b5
        • 2.Bxd6#
      • 1...R2b5!
  • Keys
    • 1.Be2!
      • threat
        • 2.Sfd3#
      • 1...Kxe5
        • 2.Scd3#
      • 1...Sxf1
        • 2.Qe4#
      • 1...Sxe2
        • 2.Qe4#
      • 1...dxc5
        • 2.Sh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD,XR(A)::QAR1(B)
    • S(b);N_GUARD::QAR1(B)
    • S(b);N_GUARD::QAR1(B),XS(b)
    • P(g);SBLOCK::S(K)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P_SPINP(f),S_FLIGHT,XP(L)::P(C)
        • S(b);XR(A)::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P_SPINP(f),S_FLIGHT,XP(L)::P(C)
        • S(b);XR(A)::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P_SPINP(f),S_FLIGHT,XP(L)::P(C)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • S(b);XR(A)::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT,XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);SBLOCK,XQ(B)::S(K)
      • Refutation
        • K(c);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(h);::S(K)
      • Refutation
        • R(a);XP(C)
    • Try
      • P(F);CHECK,XS(b)
      • Refutation
        • K(c);S_FLIGHT,XP(F)
    • Try
      • P(L);P_PINP(f),XP(g)
      • Threat
        • S(K)
      • Vars
        • K(c);S_FLIGHT::S(D)
        • R(e);N_GUARD::B(N),XP(f)
      • Refutation
        • R(a);
  • Actual
    • B(H);
    • Threat
      • R(A)+S(D),DCHECK
    • Vars
      • K(c);P_SPINP(f),S_FLIGHT,XP(L)::R(J)+S(K),DCHECK
      • S(b);N_GUARD,XR(A)::QAR1(B)
      • S(b);N_GUARD,XB(H)::QAR1(B)
      • P(f);XS(K)::R(A)+S(D),DCHECK
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