MESON Chess Problem Database

Problem Display
PID: 10078 (4N1Q1/r1b1pqBR/1N2k1pp/2R5/2p3KP/1r4pB/8/8 w - - 0 1)

Lipton, Michael

1st HM., Tidskrift for Schack, 1961

4N1Q1/r1b1pqBR/1N2k1pp/2R5/2p3KP/1r4pB/8/8

#2

9 + 10

3174 The Two-move Chess Problem Tradition and Development 1966
56 The Problemist 2001
133 The Problemist Supplement 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Rxe5#
    • 1...Bd8
      • 2.Re5#
      • 2.Rc6#
    • 1...g5
      • 2.Rxh6#
    • 1...h5+
      • 2.Kg5#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Qxf7#
      • 1...h5+
        • 2.Kg5#
      • 1...Qxg8
        • 2.Kf3#
      • 1...Bxb6
        • 2.Kxg3#
      • 1...Rxb6!
    • 1.Be5?
      • threat
        • 2.Sg7#
        • 2.Qxf7#
      • 1...h5+
        • 2.Kg5#
      • 1...Qxg8
        • 2.Kf4#
      • 1...Rxb6
        • 2.Kxg3#
      • 1...Bxe5
        • 2.Qxf7#
      • 1...Rf3
        • 2.Sg7#
      • 1...Bxb6!
    • 1.Bxh6?
      • threat
        • 2.Kg5#
        • 2.Qxf7#
      • 1...Qxg8
        • 2.Kg5#
      • 1...Rxb6
        • 2.Kg5#
      • 1...Bxb6
        • 2.Kg5#
      • 1...Bf4
        • 2.Qxf7#
      • 1...g2
        • 2.Qxf7#
      • 1...g5
        • 2.Kxg5#
        • 2.Qxf7#
      • 1...Rf3!
  • Keys
    • 1.Bf6!
      • threat
        • 2.Qxf7#
      • 1...h5+
        • 2.Kg5#
      • 1...Qxg8
        • 2.Rxe7#
      • 1...Rxb6
        • 2.Kf3#
      • 1...Bxb6
        • 2.Kf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(h);N_GUARD::R1(D),XB(h)
    • P(e);OGATEB::R(G),XP(f)
    • P(f);CHECK::B(A)+K(B)
  • Tries
    • Try
      • B(F);
      • Threat
        • QAB1(I),XQ(j)
      • Vars
        • P(f);CHECK::B(A)+K(B)
        • Q(j);N_SPINQ(j),XQ(I)::B(A)+K(B)
        • B(h);XS(E)::B(A)+K(B),XP(b)
      • Refutation
        • R(a);XS(E)
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);CHECK::B(A)+K(B)
        • Q(j);N_SPINQ(j),XQ(I)::B(A)+K(B)
        • R(a);XS(E)::B(A)+K(B),XP(b)
        • B(h);XB(F)::QAB1(I),XQ(j)
        • R(a);::S(H)
      • Refutation
        • B(h);XS(E)
    • Try
      • B(F);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);N_SPINQ(j),XQ(I)::B(A)+K(B)
        • R(a);XS(E)::B(A)+K(B)
        • B(h);XS(E)::B(A)+K(B)
        • B(h);::QAB1(I),XQ(j)
        • P(b);::QAB1(I),XQ(j)
      • Refutation
        • R(a);
  • Actual
    • B(F);
    • Threat
      • QAB1(I),XQ(j)
    • Vars
      • P(f);CHECK::B(A)+K(B)
      • Q(j);N_SPINQ(j),OGATE,XQ(I)::R1(G),XP(i)
      • R(a);XS(E)::B(A)+K(B)
      • B(h);XS(E)::B(A)+K(B)
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