MESON Chess Problem Database

Problem Display
PID: 21041 (6nK/1pb1p1NB/1p2r1p1/2p4R/Q1n1k3/2r1P2N/2p1PP2/8 w - - 0 1)

Anderson, Gerald Frank

Natal Mercury, 1915

6nK/1pb1p1NB/1p2r1p1/2p4R/Q1n1k3/2r1P2N/2p1PP2/8

#2

9 + 12

2740 Adventures of my Chessmen 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qxc4#
    • 1...Rb3
      • 2.Qxc4#
    • 1...Rxe3
      • 2.Qxc4#
    • 1...Sf6
      • 2.Bxg6#
  • Tries
    • 1.Qxc2+?
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rxc2!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd5#
      • 1...Sxe3
        • 2.f3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Re5
        • 2.Rh4#
      • 1...Rd6
        • 2.Qg4#
      • 1...Be5
        • 2.Sg5#
      • 1...Bd6
        • 2.Qxb7#
      • 1...Se5
        • 2.Sg5#
      • 1...Sd6
        • 2.Qxe6#
      • 1...Sf6
        • 2.Bxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD::QAR2(E),XS(c)
    • R(b);N_GUARD,XP(C)::QAR2(E),XS(c)
    • S(l);S_CUTR(g)::B(H),XP(h)
  • Tries
    • Try
      • Q(E);CHECK,N_PINS(c),XP(a)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(E),XR(b)
      • Refutation
        • R(b);XQ(E)
  • Actual
    • Q(E);N_PINS(c)
    • Threat
      • QAB1(E)
    • Vars
      • S(c);SBLOCK,XP(C)::P(B)
      • R(b);N_GUARD::QAB1(E),XR(b)
      • R(g);SBLOCK,S_CUTB(j)::R(F)
      • R(g);OGATE::QAR2(E)
      • B(j);P_PINS(G),SBLOCK::S(D)
      • B(j);OGATE::QAB(E),XP(i)
      • S(c);SBLOCK::S(D)
      • S(c);N_GUARD,S_CUTB(j)::QAR2(E),XR(g)
      • S(l);S_CUTR(g)::B(H),XP(h)
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