MESON Chess Problem Database

Problem Display
PID: 51630 (Qnb5/p2npK2/k2bR1p1/pRr1p1P1/p3PN2/N3B3/8/8 w - - 0 1)

Barrow, John Hugh

Chess Amateur (The), 1924

Qnb5/p2npK2/k2bR1p1/pRr1p1P1/p3PN2/N3B3/8/8

#2

9 + 12

5257 Chess Problems by J H Barrow 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qxa7#
    • 1...Rc2
      • 2.Qxa7#
    • 1...Rc3
      • 2.Qxa7#
    • 1...Rc4
      • 2.Qxa7#
    • 1...Rxb5
      • 2.Qxa7#
    • 1...Rd5
      • 2.Qxa7#
    • 1...Rc6
      • 2.Qxa7#
    • 1...Bb7
      • 2.Qxb7#
    • 1...Sc6
      • 2.Qxc8#
  • Tries
    • 1.Bxc5?
      • threat
        • 2.Qxa7#
      • 1...Sb6
        • 2.Rxb6#
      • 1...Sc6
        • 2.Qxc8#
      • 1...Sxc5!
    • 1.Rxd6+?
      • 1...Rc6
        • 2.Qxa7#
      • 1...Sb6
        • 2.Rbxb6#
        • 2.Rdxb6#
      • 1...Sc6
        • 2.Qxc8#
      • 1...exd6!
  • Keys
    • 1.Sd5!
      • 1...Rxb5
        • 2.Sc7#
        • 2.Qxa7#
      • 1...Rxd5
        • 2.Qxa7#
      • 1...Rc7
        • 2.Sxc7#
      • 1...Rc1
        • 2.Qxa7#
      • 1...Rc2
        • 2.Qxa7#
      • 1...Rc3
        • 2.Qxa7#
      • 1...Rc4
        • 2.Qxa7#
      • 1...Rc6
        • 2.Qxa7#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Sb6
        • 2.Rxb6#
      • 1...Sf6
        • 2.Rb6#
      • 1...Sf8
        • 2.Rb6#
      • 1...Sc6
        • 2.Qxc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(c);::QAR1(I),XP(h)
    • R(c);XR(E)::QAR1(I),XP(h)
    • R(c);N_SPINB(f)::QAR1(I),XP(h)
    • B(l);N_GUARD::QAB1(I),XB(l)
    • S(k);N_SPINB(f),OGATE::QAB(I),XB(l)
  • Tries
    • Try
      • B(B);XR(c)
      • Threat
        • QAR1(I),XP(h)
      • Vars
        • S(i);N_GUARD,N_SPINB(f)::R1(E),XS(i)
        • S(k);N_SPINB(f),OGATE::QAB(I),XB(l)
      • Refutation
        • S(i);XB(B)
    • Try
      • R(G);CHECK,XB(f)
      • Vars
        • R(c);P_SPINR(c)::QAR1(I),XP(h)
        • S(k);OGATE,P_SPINS(k)::QAB(I),XB(l)
      • Refutation
        • P(j);XR(G)
  • Actual
    • S(D);
    • Vars
      • R(c);XS(D)::QAR1(I),XP(h)
      • R(c);N_GUARD::S(D),XR(c)
      • R(c);::QAR1(I),XP(h)
      • R(c);N_SPINB(f)::QAR1(I),XP(h)
      • B(l);N_GUARD::QAB1(I),XB(l)
      • S(i);N_GUARD,N_SPINB(f)::R1(E),XS(i)
      • S(i);N_GUARD::R1(E)
      • S(k);N_SPINB(f),OGATE::QAB(I),XB(l)
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