MESON Chess Problem Database

Problem Display
PID: 107894 (3RR3/4p3/4pP2/1rp2NQn/4kP1P/1P2p1b1/4B3/7K w - - 0 1)

Chartier, Louis-Philippe

Apprenti Sorcier, 1992

3RR3/4p3/4pP2/1rp2NQn/4kP1P/1P2p1b1/4B3/7K

#2

10 + 8

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf4
      • 2.Sxg3#
    • 1...Sxf6
      • 2.Sxg3#
    • 1...Sg7
      • 2.Sxg3#
    • 1...c4
      • 2.Rd4#
    • 1...exf5
      • 2.Rxe7#
    • 1...exf6
      • 2.Rxe6#
  • Tries
    • 1.Sd6+?
      • 1...Kd4
        • 2.Qe5#
      • 1...exd6!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Re5#
      • 1...Kxd5
        • 2.Bf3#
      • 1...Bxf4
        • 2.Qg2#
      • 1...Sxf4
        • 2.Sxg3#
      • 1...exd5
        • 2.Rxe7#
      • 1...exf5
        • 2.Qxf5#
      • 1...exf6
        • 2.Sd6#
      • 1...c4
        • 2.Rd4#
      • 1...e5
        • 2.Rxe5#

Anticipated by 109385(1954)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(f);N_GUARD,XP(D)::S(F),XB(b)
    • S(f);N_GUARD,XP(H)::S(F),XB(b)
    • S(f);N_GUARD::S(F),XB(b)
    • P(e);N_GUARD::R1(I)
    • P(g);OGATEB,P_SPINP(h),XS(F)::R(J),XP(h)
    • P(h);OGATE,P_SPINP(g),XP(H)::R(J),XP(g)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(G)
      • Refutation
        • P(h);P_SPINP(g),XS(F)
  • Actual
    • R(I);
    • Threat
      • R1(I)
    • Vars
      • K(c);S_FLIGHT,XR(I)::B(B)
      • B(b);OGATE,SBLOCK,XP(D)::QAB(G)
      • S(f);N_GUARD,XP(D)::S(F),XB(b)
      • P(g);OGATEB,P_SPINP(h),SBLOCK,XR(I)::R(J),XP(h)
      • P(g);OGATE,P_SPINP(h),XS(F)::QAB1(G),XP(g)
      • P(h);N_GUARD,P_SPINP(g),XP(H)::S(F)
      • P(e);N_GUARD::R1(I)
      • P(g);::R1(I),XP(g)
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