MESON Chess Problem Database

Problem Display
PID: 257647 (1b6/1Rp5/7r/7r/pNpB4/pkpN2Qp/b6K/n7 w - - 0 1)

Easter, Norris

British Chess Magazine, 1934

1b6/1Rp5/7r/7r/pNpB4/pkpN2Qp/b6K/n7

#2

6 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Sc1#
      • 2.Sc5#
  • Tries
    • 1.Sc5+?
      • 1...Rxc5
        • 2.Qxc3#
      • 1...Kb2!
    • 1.Sc2+?
      • 1...Rb5
        • 2.Sxa1#
      • 1...Rb6
        • 2.Sxa1#
      • 1...Kxc2!
  • Keys
    • 1.Se1!
      • threat
        • 2.Qxc3#
      • 1...Kb2
        • 2.Sbd3#
      • 1...c5
        • 2.Sc6#
      • 1...c6
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK,P_PINP(e)
      • Vars
        • R(i);XS(B)::QAR1(C),XP(e)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • R(i);P_SPINR(i)::S(D),XS(a)
        • R(j);P_SPINR(j)::S(D),XS(a)
      • Refutation
        • K(d);S_FLIGHT,XS(D)
  • Actual
    • S(B);P_PINP(e)
    • Threat
      • QAR1(C),XP(e)
    • Vars
      • K(d);P-FLIGHT::R(F)+S(D),DCHECK
      • P(k);P_PINQ(C),S_CUTR(i)::R(F)+S(D)
      • P(k);P_PINQ(C),S_CUTR(j)::R(F)+S(D)
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