MESON Chess Problem Database

Problem Display
PID: 17241 (8/3K1p2/8/2Q2ppq/p7/6p1/2P3r1/R1NkN1R1 w - - 0 1)

Hartong, Jan

1st HM., Shakhmaty, 1925

8/3K1p2/8/2Q2ppq/p7/6p1/2P3r1/R1NkN1R1

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd2
      • 2.Qd4#
    • 1...Qe2
      • 2.Sb3#
    • 1...Rxc2
      • 2.Sf3#
      • 2.Qxc2#
    • 1...Rd2+
      • 2.Sed3#
    • 1...Re2
      • 2.Sb3#
    • 1...Rh2
      • 2.Sf3#
  • Tries
    • 1.Rxg2?
      • threat
        • 2.Sa2#
        • 2.Sb3#
        • 2.Scd3#
      • 1...Kxe1
        • 2.Sd3#
        • 2.Qg1#
      • 1...Qe2
        • 2.Sb3#
      • 1...Qh8!
    • 1.Qe3?
      • threat
        • 2.Sa2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Scd3#
      • 1...Rd2+
        • 2.Scd3#
      • 1...Rxc2
        • 2.Sg2#
        • 2.Sed3#
        • 2.Sf3#
      • 1...Qe2
        • 2.Sa2#
        • 2.Sxe2#
        • 2.Sb3#
        • 2.Scd3#
      • 1...Re2
        • 2.Sa2#
        • 2.Sxe2#
        • 2.Sb3#
        • 2.Scd3#
      • 1...Qh8!
    • 1.Qc4?
      • threat
        • 2.Sb3#
      • 1...Rd2+
        • 2.Sed3#
      • 1...Kd2
        • 2.Qd3#
        • 2.Qd4#
      • 1...Rxc2
        • 2.Sf3#
        • 2.Qxc2#
      • 1...Qh8!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Sb3#
      • 1...Rd2+
        • 2.Scd3#
      • 1...Kd2
        • 2.Qd4#
      • 1...Rxc2
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(a);P-FLIGHT::QAR2(F)
    • Q(g);SBLOCK::R(A)+S(B)
    • R(b);CHECK,N_GUARD,SBLOCK::R(D)+S(C)
    • R(b);SBLOCK::R(A)+S(B)
    • R(b);N_GUARD::R(D)+S(C)
  • Tries
    • Try
      • R(D);XR(b)
      • Threat
        • DUALS(3)
      • Vars
        • Q(g);::R(A)+S(B)
      • Refutation
        • Q(g);
    • Try
      • Q(F);
      • Threat
        • DUALS(4)
      • Vars
        • R(b);CHECK::R(A)+S(B)
      • Refutation
        • Q(g);
    • Try
      • Q(F);
      • Threat
        • R(A)+S(B)
      • Vars
        • R(b);CHECK,N_GUARD,SBLOCK::R(D)+S(C)
      • Refutation
        • Q(g);
  • Actual
    • Q(F);
    • Threat
      • R(A)+S(B)
    • Vars
      • R(b);CHECK,SBLOCK::R(A)+S(B)
      • K(a);P-FLIGHT::QAR2(F)
      • R(b);N_GUARD,SBLOCK,XP(E)::R(D)+S(C)
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