MESON Chess Problem Database

Problem Display
PID: 65051 (8/8/8/2p4b/8/KNpp4/1pkp1qNR/1R3Q2 w - - 0 1)

Rothstein, Louis

Good Companions (August), 1921

8/8/8/2p4b/8/KNpp4/1pkp1qNR/1R3Q2

#2

6 + 8

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qh4
      • 2.Se3#
    • 1...Qf5
      • 2.Se3#
    • 1...Qf6
      • 2.Se3#
    • 1...Qf7
      • 2.Se3#
    • 1...Qf8
      • 2.Se3#
    • 1...Bd1
      • 2.Qxd1#
    • 1...Bg6
      • 2.Qd1#
    • 1...Bf7
      • 2.Qd1#
    • 1...Be8
      • 2.Qd1#
  • Keys
    • 1.Ra1!
      • threat
        • 2.Qb1#
      • 1...bxa1Q+
        • 2.Sxa1#
      • 1...bxa1R+
        • 2.Sxa1#
      • 1...b1S+
        • 2.Qxb1#
      • 1...Qxf1
        • 2.Se3#
      • 1...bxa1S
        • 2.Sxa1#
      • 1...bxa1B
        • 2.Sxa1#
      • 1...b1Q
        • 2.Qxb1#
      • 1...b1B
        • 2.Qxb1#
      • 1...b1R
        • 2.Qxb1#
      • 1...d1Q
        • 2.Se3#
      • 1...d1S
        • 2.Se1#
      • 1...d1B
        • 2.Se1#
        • 2.Se3#
      • 1...d1R
        • 2.Se3#
      • 1...Qe1
        • 2.Sxe1#
      • 1...Qg1
        • 2.Se1#
      • 1...Bd1
        • 2.Qxd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 9
  • Sets
    • Q(d);N_GUARD::S(C),XQ(d)
    • Q(d);N_GUARD::S(C)
    • B(h);N_GUARD::QAB1(B),XB(h)
    • B(h);N_GUARD::QAB1(B)
  • Actual
    • R(A);
    • Threat
      • QAB1(B)
    • Vars
      • P(a);CHECK,XR(A)::S(F),XQ(a)
      • P(a);CHECK,XR(A)::S(F),XR(a)
      • P(a);CHECK::QAB1(B),XS(a)
      • Q(d);N_GUARD,XQ(B)::S(C)
      • P(a);XR(A)::S(F),XS(a)
      • P(a);XR(A)::S(F),XB(a)
      • P(a);::QAB1(B),XQ(a)
      • P(a);::QAB1(B),XB(a)
      • P(a);::QAB1(B),XR(a)
      • P(c);S_CUTQ(d)::S(C)
      • P(c);N_GUARD,S_CUTQ(d)::S(C)
      • Q(d);N_GUARD,S_CUTP(c),S_CUTP(c),S_CUTP(c),S_CUTP(c)::S(C),XQ(d)
      • Q(d);N_GUARD,S_CUTP(c),S_CUTP(c),S_CUTP(c),S_CUTP(c)::S(C)
      • B(h);N_GUARD::QAB1(B),XB(h)
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