MESON Chess Problem Database

Problem Display
PID: 219870 (8/4p3/K4N2/3R4/QpknNB2/7r/4p2r/8 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1970

(First published on Sun Oct 25 1970)

8/4p3/K4N2/3R4/QpknNB2/7r/4p2r/8

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qb3#
    • 1...Rd3
      • 2.Rc5#
    • 1...Sb3
      • 2.Qb5#
    • 1...Sf3
      • 2.Qc2#
  • Tries
    • 1.Sd2+?
      • 1...Kd3
        • 2.Qb3#
      • 1...Kc3!
    • 1.Qc2+?
      • 1...Rc3
        • 2.Sd2#
        • 2.Rc5#
      • 1...Sxc2!
    • 1.Qxb4+?
      • 1...Kd3
        • 2.Qc3#
        • 2.Qb3#
      • 1...Kxb4!
  • Keys
    • 1.Be5!
      • threat
        • 2.Rxd4#
      • 1...Kd3
        • 2.Qb3#
      • 1...Rd3
        • 2.Rc5#
      • 1...Sc2
        • 2.Sd2#
      • 1...Sb3
        • 2.Qb5#
      • 1...Sf3
        • 2.Qc2#
      • 1...Sb5
        • 2.Sd2#
      • 1...Sf5
        • 2.Sd2#
      • 1...Sc6
        • 2.Sd2#
      • 1...Se6
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINP(d),P_SPINS(f),S_FLIGHT::QAR2(A)
    • R(c);SBLOCK::R1(D)
    • S(f);N_GUARD,SBLOCK::QAB1(A)
    • S(f);N_GUARD,S_CUTR(c)::QAR2(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(e);N_SPINP(d),P_SPINS(f),S_FLIGHT::QAR2(A)
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(d)
      • Refutation
        • S(f);XQ(A)
    • Try
      • Q(A);CHECK,XP(d)
      • Refutation
        • K(e);P-FLIGHT,XQ(A)
  • Actual
    • B(C);
    • Threat
      • R1(D),XS(f)
    • Vars
      • K(e);N_SPINP(d),P_SPINS(f),S_FLIGHT::QAR2(A)
      • R(c);SBLOCK::R1(D)
      • S(f);::S(B)
      • S(f);N_GUARD,SBLOCK::QAB1(A)
      • S(f);N_GUARD,S_CUTR(c)::QAR2(A)
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