MESON Chess Problem Database

Problem Display
PID: 105087 (8/1B1NBn2/7p/7r/q2r2kp/5R1R/8/3Qn2K w - - 0 1)

Krikheli, Iosif Mikhailovich

Boletim da UBP, 1965

8/1B1NBn2/7p/7r/q2r2kp/5R1R/8/3Qn2K

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Qxd4#
    • 1...Qb5
      • 2.Qxd4#
    • 1...Qa2
      • 2.Qxd4#
    • 1...Qa3
      • 2.Qxd4#
    • 1...Qa5
      • 2.Qxd4#
    • 1...Qa6
      • 2.Qxd4#
    • 1...Qa8
      • 2.Qxd4#
    • 1...Ra5
      • 2.Rxh4#
    • 1...Rb5
      • 2.Rxh4#
    • 1...Rc5
      • 2.Rxh4#
    • 1...Rd5
      • 2.Rxh4#
    • 1...Re5
      • 2.Rxh4#
    • 1...Rf5
      • 2.Rxh4#
    • 1...Rg5
      • 2.Sf6#
    • 1...Sc2
      • 2.Qg1#
    • 1...Sd3
      • 2.Qg1#
    • 1...Sxf3
      • 2.Qxf3#
    • 1...Sg5
      • 2.Se5#
      • 2.Sf6#
  • Tries
    • 1.Se5+?
      • 1...Rxe5
        • 2.Rxh4#
      • 1...Sxe5!
    • 1.Rfg3+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Kf5!
    • 1.Rf4+?
      • 1...Kxh3
        • 2.Qg4#
      • 1...Kxf4!
  • Keys
    • 1.Bc8!
      • threat
        • 2.Se5#
      • 1...Qxd7
        • 2.Qxd4#
      • 1...Rxd7
        • 2.Qxa4#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Ra5
        • 2.Rxh4#
      • 1...Rb5
        • 2.Rxh4#
      • 1...Rc5
        • 2.Rxh4#
      • 1...Rhd5
        • 2.Rxh4#
      • 1...Re5
        • 2.Rxh4#
      • 1...Rf5
        • 2.Rxh4#
      • 1...Rg5
        • 2.Sf6#
      • 1...Se5
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD::QAR(A),XR(c)
    • R(f);N_GUARD::R1(D),XP(e)
    • R(f);SBLOCK::S(F)
    • S(a);OGATE::QAR(A)
    • S(a);OGATE,P_SPINS(a),XR(C)::QAB1(A),XS(a)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(f);XS(F)::R1(D),XP(e)
      • Refutation
        • S(h);XS(F)
    • Try
      • R(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(D)::QAB1(A)
      • Refutation
        • K(d);P-FLIGHT,XR(C)
  • Actual
    • B(E);
    • Threat
      • B(E)+S(F),DCHECK
    • Vars
      • Q(b);N_GUARD,P_SPINQ(b),XS(F)::QAR(A),XR(c)
      • R(c);OGATEB,P_SPINR(c),XS(F)::QAR(A),XQ(b)
      • S(a);OGATE,P_SPINS(a),XR(C)::QAB1(A),XS(a)
      • R(f);N_GUARD::R1(D),XP(e)
      • R(f);SBLOCK::B(E)+S(F),DCHECK
      • S(h);::B(E)+S(F),DCHECK,XS(h)
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