MESON Chess Problem Database

Problem Display
PID: 68081 (4Q1b1/8/3P1RN1/2pk1n2/3P1r2/1P2r3/N3P3/1BK2nBq w - - 0 1)

Pituk, Alexander

3rd HM., diagrammes, 1977

4Q1b1/8/3P1RN1/2pk1n2/3P1r2/1P2r3/N3P3/1BK2nBq

#2

11 + 8

5865 Czech Album (1976-1978) 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qe5#
    • 1...Rxe2
      • 2.Sc3#
      • 2.Sxf4#
      • 2.Qa8#
    • 1...Rc3+
      • 2.Sxc3#
    • 1...Rd3
      • 2.Sxf4#
      • 2.Qa8#
    • 1...Ref3
      • 2.Qa8#
    • 1...Rg3
      • 2.Sxf4#
      • 2.Qa8#
    • 1...Rh3
      • 2.Sxf4#
      • 2.Qa8#
    • 1...Ree4
      • 2.Sc3#
      • 2.Qa8#
    • 1...Re5
      • 2.Sc3#
      • 2.Sxf4#
      • 2.Qa8#
    • 1...Re7
      • 2.Sc3#
      • 2.Sxf4#
    • 1...Rxd4
      • 2.Qa8#
    • 1...Sxd4
      • 2.Sxf4#
    • 1...cxd4
      • 2.Qb5#
  • Tries
    • 1.Sc3+?
      • 1...Kxd4
        • 2.Qe5#
      • 1...Rxc3+!
    • 1.Sb4+?
      • 1...Kxd4
        • 2.Qe5#
      • 1...cxb4!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxc5#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Kxd4
        • 2.Qd3#
      • 1...Rxd4
        • 2.Qb7#
      • 1...Sxd4
        • 2.Sb4#
      • 1...Rd3
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(f);P-FLIGHT,P_SPINR(c),XP(G)::QAB1(K)
    • R(c);CHECK,N_GUARD::S(D),XR(c)
    • R(c);::QAB(K)
    • R(d);SBLOCK,XP(G)::QAB(K)
    • S(g);SBLOCK,XP(G)::S(J),XR(d)
    • P(e);OGATEB,SBLOCK,XP(G)::QAR2(K)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINR(c),XP(G)::QAB1(K)
      • Refutation
        • R(c);CHECK,XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINR(c),XP(G)::QAB1(K)
      • Refutation
        • P(e);XS(D)
  • Actual
    • Q(K);P_PINP(e)
    • Threat
      • QAR1(K),XP(e)
    • Vars
      • R(c);CHECK,N_GUARD::S(D),XR(c)
      • K(f);N_SPINP(e),OGATEB,P-FLIGHT,P_SPINR(c),XP(G)::QAR1(K)
      • R(d);SBLOCK,XP(G)::QAB(K)
      • S(g);SBLOCK,XP(G)::S(D)
      • R(c);::QAB(K)
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