MESON Chess Problem Database

Problem Display
PID: 2169 (2bR4/6B1/1p1P1p2/1RN2k1P/8/2p1PN1K/2q1P3/n1rB4 w - - 0 1)

Challenger, Alfred Clement

Source?, 0000

2bR4/6B1/1p1P1p2/1RN2k1P/8/2p1PN1K/2q1P3/n1rB4

#2

11 + 8

2794 Terms & Themes of Chess Problems 1907

SOLUTION

  • SOUND
  • Tries
    • 1.Sd4+?
      • 1...Kg5+
        • 2.Sce6#
      • 1...Ke5+!
    • 1.Sh4+?
      • 1...Kg5+
        • 2.Se6#
      • 1...Ke5+!
    • 1.Sd7+?
      • 1...Ke4
        • 2.Re8#
      • 1...Ke6!
    • 1.Re8?
      • threat
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Se4#
        • 2.Sa6#
        • 2.Sb7#
        • 2.Sd7#
      • 1...Qxd1
        • 2.Sd3#
      • 1...Qxe2
        • 2.Sd3#
      • 1...Rxd1
        • 2.Sd3#
      • 1...bxc5
        • 2.Rxc5#
      • 1...Qb1
        • 2.Sb3#
      • 1...Qb3
        • 2.Sxb3#
      • 1...Qd3
        • 2.Sxd3#
      • 1...Qa4
        • 2.Sxa4#
      • 1...Qe4
        • 2.Sxe4#
      • 1...Qa2
        • 2.Sb3#
      • 1...Qb2
        • 2.Sb3#
      • 1...Qd2
        • 2.Sd3#
      • 1...Rb1
        • 2.Sb3#
      • 1...Ba6
        • 2.Sxa6#
      • 1...Bb7
        • 2.Sxb7#
      • 1...Bd7
        • 2.Sxd7#
      • 1...Sb3
        • 2.Sxb3#
      • 1...Be6!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sce4#
        • 2.Sa6#
        • 2.Sce6#
        • 2.Sb7#
        • 2.Sd7#
      • 1...Ke5+
        • 2.Sce6#
      • 1...Kxg5+
        • 2.Se6#
      • 1...Qxd1
        • 2.Sd3#
      • 1...Qxe2
        • 2.Sd3#
      • 1...Rxd1
        • 2.Sd3#
      • 1...bxc5
        • 2.Rxc5#
      • 1...fxg5
        • 2.Rf8#
      • 1...Qb1
        • 2.Sb3#
      • 1...Qb3
        • 2.Sxb3#
      • 1...Qd3
        • 2.Sxd3#
      • 1...Qa4
        • 2.Sxa4#
      • 1...Qe4
        • 2.Scxe4#
      • 1...Qa2
        • 2.Sb3#
      • 1...Qb2
        • 2.Sb3#
      • 1...Qd2
        • 2.Sd3#
      • 1...Rb1
        • 2.Sb3#
      • 1...Ba6
        • 2.Sxa6#
      • 1...Be6
        • 2.Scxe6#
      • 1...Bb7
        • 2.Sxb7#
      • 1...Bd7
        • 2.Sxd7#
      • 1...Sb3
        • 2.Sxb3#

This is a version of 144163

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 21
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);CHECK,P-FLIGHT::R(F)+S(G),DCHECK
      • Refutation
        • K(e);CHECK,P-FLIGHT,P_SPINP(g)
    • Try
      • S(D);CHECK
      • Vars
        • K(e);CHECK,P-FLIGHT::R(F)+S(G),DCHECK
      • Refutation
        • K(e);CHECK,P-FLIGHT,P_SPINP(g)
    • Try
      • S(G);CHECK
      • Vars
        • K(e);P_PINS(G),S_FLIGHT::R(K)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(K);
      • Threat
        • DUALS(7)
      • Vars
        • Q(c);XB(A)::R(F)+S(G)
        • Q(c);XP(B)::R(F)+S(G)
        • R(b);XB(A)::R(F)+S(G)
        • P(f);OGATE,P_SPINP(f),XS(G)::R(F),XP(f)
        • Q(c);::R(F)+S(G)
        • Q(c);::R(F)+S(G),XQ(c)
        • R(b);::R(F)+S(G)
        • B(h);::R(F)+S(G),XB(h)
        • S(a);::R(F)+S(G),XS(a)
      • Refutation
        • B(h);
  • Actual
    • S(D);
    • Threat
      • DUALS(8)
    • Vars
      • K(e);CHECK,P-FLIGHT,P_SPINP(g)::R(F)+S(G)
      • K(e);CHECK,P-FLIGHT,XS(D)::R(F)+S(G),DCHECK
      • Q(c);XB(A)::R(F)+S(G)
      • Q(c);XP(B)::R(F)+S(G)
      • R(b);XB(A)::R(F)+S(G)
      • P(f);OGATE,P_SPINP(f),XS(G)::R(F),XP(f)
      • P(g);OGATEB,SBLOCK,XS(D)::R(K)
      • Q(c);::R(F)+S(G)
      • Q(c);::R(F)+S(G),XQ(c)
      • Q(c);P_PINP(C)::R(F)+S(G),XQ(c)
      • R(b);::R(F)+S(G)
      • B(h);::R(F)+S(G),XB(h)
      • S(a);::R(F)+S(G),XS(a)
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