MESON Chess Problem Database

Problem Display
PID: 86464 (3R4/1ppR4/2p1B2p/5p2/Q2pkr2/3r1NBP/5P1K/8 w - - 0 1)

Rudenko, Valentin Fedorovich

Scacchi, 1973

3R4/1ppR4/2p1B2p/5p2/Q2pkr2/3r1NBP/5P1K/8

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rdxf3
      • 2.Qxd4#
    • 1...c5
      • 2.Bd5#
    • 1...b6
      • 2.Qxc6#
  • Tries
    • 1.Qc2?
      • 1...Kxf3
        • 2.Qxd3#
      • 1...Rxf3
        • 2.Rxd4#
      • 1...Rg4
        • 2.Sd2#
      • 1...Rh4
        • 2.Sd2#
      • 1...c5
        • 2.Bd5#
      • 1...b5
        • 2.Qxc6#
      • 1...b6
        • 2.Qxc6#
      • 1...h5!
    • 1.Qxd4+?
      • 1...Kxf3
        • 2.Qxd3#
      • 1...Rxd4!
  • Keys
    • 1.Qb5!
      • 1...Kxf3
        • 2.Qxd3#
      • 1...Rdxf3
        • 2.Rxd4#
      • 1...Rfxf3
        • 2.Qe5#
      • 1...cxb5
        • 2.Bd5#
      • 1...Rd1
        • 2.Qe2#
      • 1...Rd2
        • 2.Sxd2#
      • 1...Ra3
        • 2.Sd2#
      • 1...Rb3
        • 2.Sd2#
      • 1...Rc3
        • 2.Sd2#
      • 1...Re3
        • 2.Sd2#
      • 1...Rg4
        • 2.Qxf5#
      • 1...Rh4
        • 2.Qxf5#
      • 1...c5
        • 2.Bd5#
      • 1...h5
        • 2.Sg5#
      • 1...b6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD,SBLOCK,XS(C)::QAR1(F),XP(b)
    • P(f);N_GUARD::B(G)
    • P(h);N_GUARD::QAB(F),XP(f)
  • Tries
    • Try
      • Q(F);N_PINP(b),P_PINR(a)
      • Vars
        • K(c);N_SPINR(a),S_FLIGHT,XS(C)::QAR2(F),XR(a)
        • R(d);SBLOCK,XS(C)::R1(H),XP(b)
        • R(d);::S(C)
        • R(d);P_PINP(E)::S(C)
        • P(f);N_GUARD::B(G)
        • P(h);N_GUARD::QAB(F),XP(f)
      • Refutation
        • P(g);
    • Try
      • Q(F);CHECK,XP(b)
      • Vars
        • K(c);S_FLIGHT,XS(C)::QAR2(F),XR(a)
      • Refutation
        • R(a);XQ(F)
  • Actual
    • Q(F);N_PINP(b)
    • Vars
      • K(c);S_FLIGHT,XS(C)::QAR2(F),XR(a)
      • R(a);N_GUARD,SBLOCK,XS(C)::R1(H),XP(b)
      • R(d);SBLOCK,XS(C)::QAR1(F)
      • P(f);N_GUARD,XQ(F)::B(G)
      • R(a);OGATE::QAR2(F)
      • R(a);N_GUARD,P_PINP(A)::S(C),XR(a)
      • R(a);N_GUARD::S(C)
      • R(d);N_GUARD::QAB1(F),XP(e)
      • R(d);N_GUARD,P_PINP(E)::QAB1(F),XP(e)
      • P(f);N_GUARD::B(G)
      • P(g);N_GUARD::S(C)
      • P(h);N_GUARD::QAB(F),XP(f)
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