MESON Chess Problem Database

Problem Display
PID: 16621 (b2N4/3n3B/1q2p3/1p4p1/pRr2kpb/K2Q2r1/7B/2N1R3 w - - 0 1)

White, Alain Campbell

American Chess Bulletin, 1942

b2N4/3n3B/1q2p3/1p4p1/pRr2kpb/K2Q2r1/7B/2N1R3

#2

8 + 12

5088 How to Solve Chess Problems 1945
461 Schach-Express 1950
5066 Classic Chess Problems by Pioneer Composers 1970

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Sxe6#
    • 1...Qf2
      • 2.Sxe6#
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qd4
      • 2.Sxe6#
    • 1...Qa5
      • 2.Sxe6#
      • 2.Qe3#
    • 1...Qc5
      • 2.Sxe6#
    • 1...Qa7
      • 2.Sxe6#
    • 1...Qc7
      • 2.Sxe6#
      • 2.Qe3#
    • 1...Qxd8
      • 2.Qe3#
    • 1...Qa6
      • 2.Qe3#
    • 1...Qc6
      • 2.Qe3#
    • 1...Qd6
      • 2.Qe3#
    • 1...Qb7
      • 2.Sxe6#
      • 2.Qe3#
    • 1...Qb8
      • 2.Sxe6#
      • 2.Qe3#
    • 1...Rd4
      • 2.Qe3#
    • 1...Bc6
      • 2.Sxe6#
    • 1...Sc5
      • 2.Qe3#
    • 1...Se5
      • 2.Se2#
    • 1...e5
      • 2.Se2#
  • Tries
    • 1.Rxc4+?
      • 1...Qd4
        • 2.Sxe6#
        • 2.Qe3#
      • 1...Be4
        • 2.Rexe4#
        • 2.Rcxe4#
      • 1...bxc4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Se2#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Qf2
        • 2.Sxe6#
      • 1...Qd4
        • 2.Sxe6#
      • 1...Rd4
        • 2.Qe3#
      • 1...Bf3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • Q(i);N_GUARD::S(H),XP(j)
    • Q(i);N_GUARD::QAB1(E),XQ(i)
    • Q(i);N_GUARD,P_PINR(F)::S(H),XP(j)
    • Q(i);N_GUARD,XS(H)::QAB1(E)
    • Q(i);N_GUARD::QAB1(E)
    • Q(i);N_GUARD,P_PINR(F)::QAB1(E)
    • R(c);S_CUTQ(i)::QAB1(E)
    • B(l);S_CUTQ(i)::S(H),XP(j)
    • S(k);S_CUTQ(i)::QAB1(E)
    • S(k);SBLOCK::S(A)
    • P(j);SBLOCK::S(A)
  • Tries
    • Try
      • R(F);CHECK,XR(c)
      • Refutation
        • P(g);XR(F)
  • Actual
    • Q(E);
    • Threat
      • S(A)
    • Vars
      • Q(i);N_GUARD::QAB1(E),XQ(i)
      • Q(i);N_GUARD::S(H),XP(j)
      • R(c);S_CUTQ(i)::QAB1(E)
      • B(l);N_PINQ(E),SBLOCK::S(A)
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