MESON Chess Problem Database

Problem Display
PID: 234962 (8/8/8/5NK1/8/3P1k2/5p2/Q2R4 w - - 0 1)

Akimov, Nikolai Nikolaevich

64 Shakhmatnoe obozrenie, 2006

8/8/8/5NK1/8/3P1k2/5p2/Q2R4

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rf1?
      • 1...Ke2
        • 2.Qd1#
      • 1...Kg2!
    • 1.Rd2?
      • threat
        • 2.Qh1#
        • 2.Qa8#
      • 1...f1Q
        • 2.Qxf1#
        • 2.Qa8#
      • 1...f1S
        • 2.Qd1#
        • 2.Qxf1#
        • 2.Qa8#
      • 1...f1B
        • 2.Qxf1#
        • 2.Qa8#
      • 1...f1R
        • 2.Qxf1#
        • 2.Qa8#
      • 1...Kg2!
    • 1.Qb2?
      • 1...f1Q
        • 2.Rxf1#
      • 1...f1S
        • 2.Rxf1#
      • 1...f1B
        • 2.Rxf1#
      • 1...f1R
        • 2.Rxf1#
      • 1...Kg2!
    • 1.Qa2?
      • 1...f1Q
        • 2.Rxf1#
      • 1...f1S
        • 2.Rxf1#
      • 1...f1B
        • 2.Rxf1#
      • 1...f1R
        • 2.Rxf1#
      • 1...Kg2!
  • Keys
    • 1.Rh1!
      • 1...Ke2
        • 2.Qd1#
      • 1...Kg2
        • 2.Qa8#
      • 1...f1Q
        • 2.Qxf1#
      • 1...f1S
        • 2.Qxf1#
      • 1...f1B
        • 2.Qxf1#
      • 1...f1R
        • 2.Qxf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::R(B),XQ(a)
        • P(a);OGATEB::R(B),XS(a)
        • P(a);OGATEB::R(B),XB(a)
        • P(a);OGATEB::R(B),XR(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::R(B),XQ(a)
        • P(a);OGATEB::R(B),XS(a)
        • P(a);OGATEB::R(B),XB(a)
        • P(a);OGATEB::R(B),XR(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::QAB(A)
      • P(a);OGATEB::QAR2(A),XQ(a)
      • P(a);OGATEB::QAR2(A),XS(a)
      • P(a);OGATEB::QAR2(A),XB(a)
      • P(a);OGATEB::QAR2(A),XR(a)
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