MESON Chess Problem Database

Problem Display
PID: 84177 (q4Q2/2p5/nr2Bp2/3PPP1p/P1k3bR/R2pKN2/nPNP4/2b3B1 w - - 0 1)

Cheylan, Yves

Keystip Ty, 1974

q4Q2/2p5/nr2Bp2/3PPP1p/P1k3bR/R2pKN2/nPNP4/2b3B1

#2

14 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.dxc6#
    • 1...Rc6
      • 2.b3#
      • 2.dxc6#
    • 1...Bxd2+
      • 2.Sxd2#
    • 1...Sc3
      • 2.Rxc3#
    • 1...S2b4
      • 2.Rc3#
      • 2.b3#
    • 1...S6b4
      • 2.b3#
    • 1...fxe5
      • 2.Sxe5#
    • 1...c5
      • 2.dxc5 ep#
    • 1...c6
      • 2.dxc6#
  • Tries
    • 1.Kf4?
      • threat
        • 2.Se3#
      • 1...Bxd2+
        • 2.Sxd2#
      • 1...fxe5+
        • 2.Sxe5#
      • 1...Qxf8
        • 2.d6#
      • 1...Bxf3
        • 2.Kxf3#
      • 1...Rd6
        • 2.b3#
      • 1...Sc5
        • 2.Qxc5#
      • 1...c5
        • 2.dxc5 ep#
      • 1...dxc2!
    • 1.Qc5+?
      • 1...Kxc5
        • 2.Kxd3#
      • 1...Sxc5!
  • Keys
    • 1.Ke4!
      • threat
        • 2.Se3#
      • 1...Qxd5+
        • 2.Bxd5#
      • 1...Bxf3+
        • 2.Kxf3#
      • 1...Bxf5+
        • 2.Kxf5#
      • 1...Sc3+
        • 2.Rxc3#
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Qxf8
        • 2.d6#
      • 1...Bxd2
        • 2.Sxd2#
      • 1...dxc2
        • 2.d3#
      • 1...Rd6
        • 2.b3#
      • 1...c5
        • 2.dxc5 ep#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • Q(k);OGATE::B(M)+P(J),XQ(k)
    • B(a);CHECK,XP(D)::S(G),XB(a)
    • S(b);N_GUARD::R1(E),XS(b)
    • S(g);S_CUTR(h)::P(B)
    • P(i);XP(K)::S(G),XP(i)
    • P(j);OGATE::B(M)+P(J),XP(j),EP
    • P(j);OGATE::B(M)+P(J),XP(j)
  • Tries
    • Try
      • K(F);N_PINB(e),S_FLIGHT
      • Threat
        • S(C)
      • Vars
        • B(a);CHECK,XP(D)::S(G),XB(a)
        • P(i);CHECK,XP(K)::S(G),XP(i)
        • Q(k);N_GUARD,XQ(N)::B(M)+P(J)
        • B(e);XS(G)::R(I)+K(F),XB(e)
        • R(h);N_GUARD::P(B)
        • S(g);N_GUARD::QAR1(N),XS(g)
        • P(j);OGATE::B(M)+P(J),XP(j),EP
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(N);CHECK
      • Vars
        • K(d);N_SPINB(e),P-FLIGHT,XQ(N)::B(A)+K(F),XP(c)
      • Refutation
        • S(g);XQ(N)
  • Actual
    • K(F);N_PINB(e),N_SPINP(D),P-FLIGHT,P_SPINP(J)
    • Threat
      • S(C)
    • Vars
      • Q(k);CHECK,OGATE,P_SPINQ(k),XP(J)::B(M),XQ(k)
      • B(e);CHECK,XS(G)::R(I)+K(F),XB(e)
      • B(e);CHECK,XP(L)::R(I)+K(F),XB(e)
      • S(b);CHECK,N_GUARD::R1(E),XS(b)
      • S(g);CHECK,N_GUARD::QAR1(N),XS(g)
      • Q(k);N_PINP(J),XQ(N)::B(M)+P(J)
      • B(a);XP(D)::S(G),XB(a)
      • P(c);OGATE,XS(C)::P(D)
      • R(h);N_GUARD::P(B)
      • P(j);::B(M)+P(J),XP(j),EP
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