MESON Chess Problem Database

Problem Display
PID: 224291 (Kb4n1/R6b/2k2n2/Bp5R/4N3/1r2p3/N1q5/5Q1r w - - 0 1)

Joseph, Samuel M

Brownson's Chess Journal, 1887

Kb4n1/R6b/2k2n2/Bp5R/4N3/1r2p3/N1q5/5Q1r

#2

7 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Rc5#
    • 1...Qd1
      • 2.Rc5#
    • 1...Qd3
      • 2.Rc5#
    • 1...Qxa2
      • 2.Rc5#
    • 1...Qb2
      • 2.Rc5#
    • 1...Qd2
      • 2.Rc5#
    • 1...Qe2
      • 2.Rc5#
    • 1...Qf2
      • 2.Rc5#
    • 1...Qg2
      • 2.Rc5#
    • 1...Qh2
      • 2.Rc5#
    • 1...Qc5
      • 2.Rxc5#
    • 1...Ra3
      • 2.Sb4#
      • 2.Qxb5#
    • 1...Rc3
      • 2.Sb4#
      • 2.Qxb5#
    • 1...Rd3
      • 2.Sb4#
    • 1...Rb4
      • 2.Sxb4#
    • 1...Bc7
      • 2.Rxc7#
    • 1...b4
      • 2.Qb5#
      • 2.Qa6#
  • Tries
    • 1.Qc4+?
      • 1...bxc4
        • 2.Rc5#
      • 1...Qxc4!
    • 1.Qd1?
      • threat
        • 2.Ra6#
      • 1...Qxd1
        • 2.Rc5#
      • 1...Bxa7
        • 2.Qd6#
      • 1...Qd3
        • 2.Rc5#
      • 1...Qd2
        • 2.Rc5#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Rd3
        • 2.Sb4#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Bc7
        • 2.Rxc7#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd7
        • 2.Qd5#
        • 2.Qxd7#
      • 1...Rxd1!
    • 1.Qxf6+?
      • 1...Bd6
        • 2.Rc7#
        • 2.Qxd6#
      • 1...Sxf6!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Ra6#
      • 1...Qxd3
        • 2.Rc5#
      • 1...Rxd3
        • 2.Sb4#
      • 1...Bxa7
        • 2.Qd6#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Bc7
        • 2.Rxc7#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd7
        • 2.Qd5#
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • Q(b);N_GUARD::R1(E)
    • Q(b);N_GUARD,XS(B)::R1(E)
    • Q(b);N_GUARD::R1(E),XQ(b)
    • R(c);N_GUARD::S(B)
    • R(c);N_GUARD::S(B),XR(c)
    • B(i);N_GUARD::R1(F),XB(i)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(e);XQ(A)::R1(E)
      • Refutation
        • Q(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • R(F)
      • Vars
        • Q(b);N_GUARD,XQ(A)::R1(E)
        • B(i);N_GUARD,XR(F)::QAR1(A)
        • Q(b);N_GUARD::R1(E)
        • Q(b);N_GUARD::R1(E),XQ(b)
        • R(c);N_GUARD::S(B)
        • B(i);N_GUARD::QAR1(A),XB(i)
        • B(i);N_GUARD::R1(F),XB(i)
        • S(g);N_GUARD::QAB1(A),XS(g)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);CHECK,XS(g)
      • Refutation
        • S(j);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • R(F)
    • Vars
      • Q(b);N_GUARD,XQ(A)::R1(E)
      • R(c);N_GUARD,XQ(A)::S(B)
      • B(i);N_GUARD,XR(F)::QAR1(A)
      • Q(b);N_GUARD::R1(E),XQ(b)
      • B(i);N_GUARD::QAR1(A),XB(i)
      • B(i);N_GUARD::R1(F),XB(i)
      • S(g);N_GUARD::QAB1(A),XS(g)
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