MESON Chess Problem Database

Problem Display
PID: 8201 (4R3/1n2RppK/3p4/3N1k2/4N1pp/pr6/qb1B2B1/Q4n2 w - - 0 1)

Sydenham, Colin Peter

The Problemist, 1995

4R3/1n2RppK/3p4/3N1k2/4N1pp/pr6/qb1B2B1/Q4n2

#2

8 + 12

15513 Selected Chess Problems of Colin Sydenham 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Rxf7#
    • 1...Rb4
      • 2.Qxf1#
    • 1...Rb5
      • 2.Qxf1#
    • 1...Rb6
      • 2.Qxf1#
    • 1...Bc1
      • 2.Rxf7#
    • 1...Bc3
      • 2.Qxf1#
    • 1...Sa5
      • 2.Sxd6#
    • 1...Sc5
      • 2.Sxd6#
    • 1...Sd8
      • 2.Sxd6#
    • 1...g3
      • 2.Bh3#
  • Tries
    • 1.Sg3+?
      • 1...Rxg3
        • 2.Be4#
      • 1...hxg3
        • 2.Be4#
      • 1...Sxg3!
    • 1.Sdc3?
      • threat
        • 2.Rxf7#
        • 2.Qxf1#
      • 1...Qxa1
        • 2.Rxf7#
      • 1...Bxa1
        • 2.Rxf7#
      • 1...Bxc3
        • 2.Qxf1#
      • 1...Sxd2
        • 2.Rxf7#
      • 1...Se3
        • 2.Rxf7#
      • 1...g3
        • 2.Bh3#
      • 1...Qb1
        • 2.Rxf7#
      • 1...Rb4
        • 2.Qxf1#
      • 1...Rb5
        • 2.Qxf1#
      • 1...Rb6
        • 2.Qxf1#
      • 1...Bc1
        • 2.Rxf7#
      • 1...Sh2
        • 2.Rxf7#
      • 1...Sg3
        • 2.Rxf7#
      • 1...Sd8
        • 2.Qxf1#
      • 1...f6
        • 2.Qxf1#
      • 1...Rxc3!
    • 1.Bc3?
      • threat
        • 2.Rxf7#
        • 2.Qxf1#
      • 1...Qxa1
        • 2.Rxf7#
      • 1...Rxc3
        • 2.Rxf7#
      • 1...Bxa1
        • 2.Rxf7#
      • 1...g3
        • 2.Bh3#
      • 1...Qb1
        • 2.Rxf7#
      • 1...Bc1
        • 2.Rxf7#
      • 1...Sd2
        • 2.Rxf7#
      • 1...Sh2
        • 2.Rxf7#
      • 1...Se3
        • 2.Rxf7#
      • 1...Sg3
        • 2.Rxf7#
      • 1...Sd8
        • 2.Qxf1#
      • 1...f6
        • 2.Qxf1#
      • 1...Bxc3!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qc8#
      • 1...Bxc1
        • 2.Rxf7#
      • 1...Rc3
        • 2.Rxf7#
      • 1...Bc3
        • 2.Qxf1#
      • 1...Sc5
        • 2.Sxd6#
      • 1...Sd8
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(e);S_CUTB(c)::R(F),XP(k)
    • R(e);N_GUARD::QAR(A),XS(a)
    • B(c);N_GUARD::R(F),XP(k)
    • B(c);S_CUTR(e)::QAR(A),XS(a)
    • S(j);N_GUARD::S(D),XP(i)
    • P(f);OGATEB::B(C)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • R(e);XS(D)::B(C)
        • P(g);XS(D)::B(C)
      • Refutation
        • S(a);XS(D)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XQ(A)::R(F),XP(k)
        • B(c);XQ(A)::R(F),XP(k)
        • B(c);XS(E)::QAR(A),XS(a)
        • S(a);XB(B)::R(F),XP(k)
        • S(a);::R(F),XP(k)
        • P(f);OGATEB::B(C)
        • Q(b);::R(F),XP(k)
        • R(e);::QAR(A),XS(a)
        • B(c);::R(F),XP(k)
        • S(j);::QAR(A),XS(a)
        • P(k);::QAR(A),XS(a)
      • Refutation
        • R(e);XS(E)
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XQ(A)::R(F),XP(k)
        • R(e);XB(B)::R(F),XP(k)
        • B(c);XQ(A)::R(F),XP(k)
        • P(f);OGATEB::B(C)
        • Q(b);::R(F),XP(k)
        • B(c);::R(F),XP(k)
        • S(a);::R(F),XP(k)
        • S(j);::QAR(A),XS(a)
        • P(k);::QAR(A),XS(a)
      • Refutation
        • B(c);XB(B)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • B(c);N_GUARD,XQ(A)::R(F),XP(k)
      • R(e);S_CUTB(c)::R(F),XP(k)
      • B(c);S_CUTR(e)::QAR(A),XS(a)
      • S(j);N_GUARD::S(D),XP(i)
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