MESON Chess Problem Database

Problem Display
PID: 256591 (6R1/1pkNp2r/r5p1/p1PQ1b2/B3pq1b/1KR1B3/8/8 w - - 0 1)

Easter, Norris

British Chess Magazine, 1933

6R1/1pkNp2r/r5p1/p1PQ1b2/B3pq1b/1KR1B3/8/8

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.cxd6#
    • 1...Rb6+
      • 2.cxb6#
    • 1...Rd6
      • 2.cxd6#
    • 1...Bxd7
      • 2.Qxd7#
    • 1...b5
      • 2.cxb5 ep#
    • 1...b6
      • 2.Qc6#
      • 2.cxb6#
  • Tries
    • 1.Bxf4+?
      • 1...Rd6
        • 2.cxd6#
      • 1...e5!
    • 1.Qe5+?
      • 1...Rd6
        • 2.cxd6#
      • 1...Qxe5!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Qd8#
      • 1...Rxb6+
        • 2.cxb6#
      • 1...Bc8
        • 2.Rxc8#
      • 1...Qd6
        • 2.cxd6#
      • 1...Ra8
        • 2.Sxa8#
      • 1...Be6
        • 2.Bxf4#
      • 1...Bd7
        • 2.Qxd7#
      • 1...e5
        • 2.Qd6#
      • 1...e6
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(b);OGATE::R(B)+P(E)DCHECK,XQ(b)
    • R(f);CHECK,OGATE::R(B)+P(E)DCHECK,XR(f)
    • R(f);OGATE::R(B)+P(E)DCHECK,XR(f)
    • B(e);OGATE,XS(G)::QAR1(F),XB(e)
    • P(h);OGATE::R(B)+P(E)DCHECK,XP(h),EP
  • Tries
    • Try
      • B(C);CHECK,XQ(b)
      • Vars
        • R(f);OGATE,P_SPINR(f)::R(B)+P(E)DCHECK,XR(f)
      • Refutation
        • P(j);P_SPINP(j)
    • Try
      • Q(F);CHECK
      • Vars
        • R(f);OGATE,P_SPINR(f)::R(B)+P(E)DCHECK,XR(f)
      • Refutation
        • Q(b);XQ(F)
  • Actual
    • S(G);
    • Threat
      • QAB1(F)
    • Vars
      • R(f);CHECK,OGATE,XS(G)::R(B)+P(E)DCHECK,XR(f)
      • B(e);N_GUARD::R1(H),XB(e)
      • Q(b);OGATE::R(B)+P(E)DCHECK,XQ(b)
      • R(f);N_GUARD::S(G),XR(f)
      • B(e);P_PINQ(F),S_CUTP(j)::B(C),XQ(b)
      • B(e);N_GUARD::QAR1(F),XB(e)
      • P(j);N_GUARD,S_CUTQ(b)::QAB1(F)
      • P(j);S_CUTB(e)::R1(H)
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