MESON Chess Problem Database

Problem Display
PID: 102409 (7q/1B1p1N2/2rP3b/4PpP1/2RK3n/2RP1kpP/b4p2/2B2Q2 w - - 0 1)

Hardran, Alain

Europe Echecs, 1963

7q/1B1p1N2/2rP3b/4PpP1/2RK3n/2RP1kpP/b4p2/2B2Q2

#2

12 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5+
      • 2.Sxe5#
    • 1...Bxc4
      • 2.dxc4#
    • 1...Bxg5
      • 2.Sxg5#
    • 1...Sg2
      • 2.Qd1#
  • Tries
    • 1.Qh1+?
      • 1...Ke2
        • 2.Rc2#
      • 1...Sg2
        • 2.Qd1#
      • 1...g2!
  • Keys
    • 1.Kd5!
      • threat
        • 2.d4#
      • 1...Qxe5+
        • 2.Sxe5#
      • 1...Rc5+
        • 2.Kxc5#
      • 1...Rxd6+
        • 2.Kxd6#
      • 1...Bxc4+
        • 2.dxc4#
      • 1...Rxc4
        • 2.dxc4#
      • 1...Bxg5
        • 2.Sxg5#
      • 1...Bb1
        • 2.Rf4#
      • 1...Sg2
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(j);CHECK,XP(H)::S(L),XQ(j)
    • B(a);OGATE,XR(F)::R(C)+P(D),XB(a)
    • B(h);XP(I)::S(L),XB(h)
    • S(e);SBLOCK::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK,N_PINP(b)
      • Vars
        • K(c);N_SPINR(g),S_FLIGHT::R(C)
        • S(e);P_SPINS(e),SBLOCK::QAB(B)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • K(G);N_PINR(g),N_SPINP(H),P-FLIGHT,P_SPINR(F)
    • Threat
      • R(C)+P(D)
    • Vars
      • Q(j);CHECK,XP(H)::S(L),XQ(j)
      • R(g);CHECK::B(K)+K(G),XR(g)
      • R(g);CHECK,XP(J)::B(K)+K(G),XR(g)
      • B(a);CHECK,OGATE,XR(F)::R(C)+P(D),XB(a)
      • R(g);OGATE,XR(F)::R(C)+P(D),XR(g)
      • B(h);XP(I)::S(L),XB(h)
      • B(a);N_PINR(F)::R1(F)
      • S(e);SBLOCK::QAB(B)
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