MESON Chess Problem Database

Problem Display
PID: 53227 (K7/3ppQ1b/p1B5/r2R4/1N2k3/7r/2PP1bn1/5R2 w - - 0 1)

Allison, Christopher John

Barron, Philip

Chess Life, 1954

K7/3ppQ1b/p1B5/r2R4/1N2k3/7r/2PP1bn1/5R2

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.cxd3#
    • 1...Be1
      • 2.Qxe7#
    • 1...Bg1
      • 2.Qxe7#
    • 1...Be3
      • 2.Qxe7#
      • 2.d3#
    • 1...Bg3
      • 2.Qf3#
    • 1...Bh4
      • 2.Qxh7#
    • 1...Bb6
      • 2.Qxe7#
    • 1...Ba7
      • 2.Qxe7#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bg8
      • 2.Qf5#
    • 1...Se3
      • 2.d3#
  • Tries
    • 1.d3+?
      • 1...Ke3
        • 2.Qxf2#
      • 1...Rxd3!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sxf2#
      • 1...Rxd3
        • 2.cxd3#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Rf3
        • 2.Qxe7#
      • 1...Be1
        • 2.Qxe7#
      • 1...Bg1
        • 2.Qxe7#
      • 1...Be3
        • 2.Qxe7#
      • 1...Bg3
        • 2.Qf3#
      • 1...Bd4
        • 2.Re5#
      • 1...Bh4
        • 2.Qxh7#
      • 1...Bc5
        • 2.Rxd7#
      • 1...Bb6
        • 2.Qxe7#
      • 1...Ba7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(c);OGATE::P(B),XR(c)
    • B(a);::QAR(G),XP(h)
    • B(a);S_CUTR(c)::QAB1(G)
    • B(a);S_CUTR(c)::QAB(G),XB(i)
    • B(i);N_GUARD::QAB1(G),XB(i)
    • B(i);N_GUARD::QAB1(G)
    • S(b);SBLOCK,S_CUTR(c)::P(C)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(G),XB(a)
      • Refutation
        • R(c);XP(C)
  • Actual
    • S(D);
    • Threat
      • S(D),XB(a)
    • Vars
      • R(c);OGATE,XS(D)::P(B),XR(c)
      • R(e);OGATE,P_SPINR(e),XR(E)::QAB1(G),XR(e)
      • B(i);N_GUARD::QAB1(G),XB(i)
      • S(b);N_GUARD::QAR1(G),XS(b)
      • R(c);SBLOCK::QAR(G),XP(h)
      • B(a);::QAR(G),XP(h)
      • B(a);S_CUTR(c)::QAB1(G)
      • B(a);SBLOCK::B(F)+R(E),DCHECK
      • B(a);S_CUTR(c)::QAB(G),XB(i)
      • B(a);S_CUTR(e)::B(F)+R(E),XP(g)
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