MESON Chess Problem Database

Problem Display
PID: 95562 (K2k4/N2q2N1/3R4/2Q5/8/4r3/8/8 w - - 0 1)

Mach, Julius Zdenek

Neue Leipziger Zeitung, 1926

K2k4/N2q2N1/3R4/2Q5/8/4r3/8/8

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Qxd6#
    • 1...Re7
      • 2.Qb6#
      • 2.Qa5#
      • 2.Qc8#
  • Tries
    • 1.Qxe3?
      • 1...Kc7
        • 2.Qb6#
      • 1...Qxd6!
    • 1.Qg5+?
      • 1...Re7
        • 2.Qa5#
      • 1...Kc7!
    • 1.Qc6?
      • threat
        • 2.Rxd7#
        • 2.Qxd7#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Rd3
        • 2.Qxd7#
      • 1...Re7
        • 2.Qb6#
        • 2.Qc8#
      • 1...Ke7!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Rxd7#
      • 1...Kc7
        • 2.Rxd7#
        • 2.Qb6#
      • 1...Ke7
        • 2.Qf6#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Re7
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_SPINQ(b),OGATE,XR(B)::QAR2(A),XQ(b)
  • Tries
    • Try
      • Q(A);XR(a)
      • Vars
        • K(c);N_SPINQ(b),S_FLIGHT::QAB1(A)
      • Refutation
        • Q(b);N_SPINQ(b),XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);P_SPINR(a),SBLOCK::QAB(A)
      • Refutation
        • K(c);N_SPINQ(b),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_SPINQ(b),OGATE,XR(B)::QAR2(A),XQ(b)
        • R(a);::QAR1(A),XQ(b)
      • Refutation
        • K(c);N_SPINQ(b),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • R1(B),XQ(b)
    • Vars
      • K(c);N_SPINQ(b),S_FLIGHT::QAB1(A)
      • Q(b);OGATE,XR(B)::QAR2(A),XQ(b)
      • R(a);SBLOCK::QAB(A)
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