MESON Chess Problem Database

Problem Display
PID: 133950 (8/R4p2/NPpk1pN1/K1p4r/1pQ3nr/5n1B/1b6/6B1 w - - 0 1)

Alkaff, Muchsin

Tan Hien Yan

The Field, 1963

(First published on Thu Jan 10 1963)

8/R4p2/NPpk1pN1/K1p4r/1pQ3nr/5n1B/1b6/6B1

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rh6
      • 2.Bxc5#
    • 1...Rh7
      • 2.Bxc5#
    • 1...Rh8
      • 2.Bxc5#
    • 1...Be5
      • 2.Bxc5#
    • 1...Sfe5
      • 2.Bxc5#
    • 1...Sg5
      • 2.Bxc5#
    • 1...Sf2
      • 2.Rd7#
    • 1...Sh2
      • 2.Rd7#
    • 1...Se3
      • 2.Rd7#
    • 1...Sge5
      • 2.Bxc5#
      • 2.Qxc5#
    • 1...Sh6
      • 2.Rd7#
    • 1...f5
      • 2.Bxc5#
  • Tries
    • 1.Qxf7?
      • threat
        • 2.Rd7#
        • 2.Qd7#
      • 1...Rh7
        • 2.Bxc5#
        • 2.Rd7#
      • 1...Sfe5
        • 2.Bxc5#
      • 1...Sge5
        • 2.Bxc5#
        • 2.Qe6#
      • 1...c4+!
    • 1.Qxc5+?
      • 1...Ke6
        • 2.Sf4#
        • 2.Sf8#
        • 2.Re7#
      • 1...Rxc5+!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Rd7#
      • 1...Rxc5+
        • 2.Bxc5#
      • 1...fxg6
        • 2.Qe6#
      • 1...Sfe5
        • 2.Se4#
      • 1...Sge5
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • R(g);N_GUARD::B(A),XP(f)
    • B(a);S_CUTR(g)::B(A),XP(f)
    • S(b);S_CUTR(g)::B(A),XP(f)
    • S(d);::R1(H)
    • P(j);S_CUTR(g)::B(A),XP(f)
  • Tries
    • Try
      • Q(C);XP(k)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);S_CUTR(g)::B(A),XP(f)
      • Refutation
        • P(f);CHECK
    • Try
      • Q(C);CHECK,P_SPINQ(C),XP(f)
      • Refutation
        • R(g);CHECK,XQ(C)
  • Actual
    • S(E);P_SPINS(E),XP(f)
    • Threat
      • R1(H)
    • Vars
      • R(g);CHECK,OGATE,XS(E)::B(A),XR(g)
      • P(k);N_GUARD,XS(G)::QAR1(C)
      • S(b);N_PINS(E)::S(E)
      • S(d);N_PINS(E)::S(E)
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