MESON Chess Problem Database

Problem Display
PID: 108375 (1B1n4/7Q/Np1p3R/1P1k3K/2p3N1/b1P4B/5r2/7b w - - 0 1)

Hall, James S

Montreal Gazette, 1953

1B1n4/7Q/Np1p3R/1P1k3K/2p3N1/b1P4B/5r2/7b

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qf5#
    • 1...Rb2
      • 2.Qf5#
    • 1...Rc2
      • 2.Qf5#
    • 1...Rd2
      • 2.Qf5#
    • 1...Rg2
      • 2.Qf5#
    • 1...Rh2
      • 2.Qf5#
    • 1...Rf5+
      • 2.Qxf5#
    • 1...Bf3
      • 2.Qf5#
    • 1...Bc1
      • 2.Rxd6#
    • 1...Bb2
      • 2.Rxd6#
    • 1...Bc5
      • 2.Sc7#
    • 1...Se6
      • 2.Qb7#
    • 1...Sb7
      • 2.Qxb7#
  • Tries
    • 1.Bg2+?
      • 1...Rxg2
        • 2.Qf5#
      • 1...Rf3
        • 2.Qf5#
      • 1...Bxg2!
    • 1.Qb7+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sxb7!
  • Keys
    • 1.Re6!
      • threat
        • 2.Se3#
      • 1...Rf5+
        • 2.Qxf5#
      • 1...Kxe6
        • 2.Sc7#
      • 1...Sxe6
        • 2.Qb7#
      • 1...Re2
        • 2.Sf6#
      • 1...Rf3
        • 2.Qe4#
      • 1...Bf3
        • 2.Qf5#
      • 1...Bc1
        • 2.Rxd6#
      • 1...Bc5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::QAR2(H)
    • R(b);N_GUARD,P_PINB(B)::QAR2(H)
    • R(b);CHECK,N_GUARD::QAR2(H),XR(b)
    • B(a);P_PINS(C),S_CUTR(b)::QAR2(H)
    • B(c);N_GUARD::R1(G),XP(g)
    • B(c);SBLOCK::S(F)
    • S(h);N_GUARD::QAB(H)
    • S(h);N_GUARD::QAB(H),XS(h)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • R(b);XB(B)::QAR2(H)
        • R(b);P_SPINR(b)::QAR2(H)
      • Refutation
        • B(a);XB(B)
    • Try
      • Q(H);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAB1(H),XS(h)
      • Refutation
        • S(h);XQ(H)
  • Actual
    • R(G);
    • Threat
      • S(C)
    • Vars
      • R(b);CHECK,N_GUARD::QAR2(H),XR(b)
      • K(e);S_FLIGHT,XR(G)::S(F)
      • S(h);N_GUARD,SBLOCK,XR(G)::QAB(H)
      • R(b);N_GUARD::S(C)
      • R(b);S_CUTB(a)::QAB1(H)
      • B(a);P_PINS(C),S_CUTR(b)::QAR2(H)
      • B(c);N_GUARD::R1(G),XP(g)
      • B(c);SBLOCK::S(F)
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