MESON Chess Problem Database

Problem Display
PID: 230287 (8/B4N1P/1n1p1RB1/bK1p4/1pnkP3/pQ1pp3/6N1/3r4 w - - 0 1)

Vakhlakov, Yuri Nikolaevich

Zadachi i Etyudi, 2000

8/B4N1P/1n1p1RB1/bK1p4/1pnkP3/pQ1pp3/6N1/3r4

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.Qxc4#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Se6#
      • 1...dxe4
        • 2.Qxc4#
      • 1...e2!
    • 1.Rf4?
      • threat
        • 2.e5#
      • 1...dxe4
        • 2.Qxc4#
      • 1...Sd2
        • 2.h8Q#
        • 2.h8B#
      • 1...Se5
        • 2.exd5#
      • 1...Rf1!
    • 1.Rf5?
      • threat
        • 2.Rxd5#
      • 1...Kxe4
        • 2.Rf4#
      • 1...dxe4
        • 2.Qxc4#
      • 1...Se5!
    • 1.Rxd6?
      • threat
        • 2.Rxd5#
        • 2.Qxc4#
      • 1...Rc1
        • 2.Rxd5#
      • 1...Sb2
        • 2.Rxd5#
        • 2.h8Q#
        • 2.h8B#
      • 1...Sd2
        • 2.Rxd5#
        • 2.h8Q#
        • 2.h8B#
      • 1...Se5
        • 2.Rxd5#
      • 1...Sxd6+!
    • 1.e5?
      • threat
        • 2.Rf4#
      • 1...Rf1
        • 2.Qxd3#
      • 1...Sd2
        • 2.Qxd3#
      • 1...dxe5!
  • Keys
    • 1.exd5!
      • threat
        • 2.Qxc4#
      • 1...Kxd5
        • 2.Rxd6#
      • 1...Rc1
        • 2.Qxd3#
      • 1...Sb2
        • 2.Rf4#
      • 1...Sd2
        • 2.Qxd3#
      • 1...Se5
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(i);N_GUARD,XP(C)::QAR1(B),XS(f)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • P(i);N_GUARD,XP(C)::QAR1(B),XS(f)
      • Refutation
        • P(d);
    • Try
      • R(E);
      • Threat
        • R(E)+P(C)
      • Vars
        • P(i);N_GUARD,P_SPINP(i),XP(C)::QAR1(B),XS(f)
        • S(f);N_GUARD::P=Q
        • S(f);::R(E)+P(C),XP(i)
      • Refutation
        • R(a);
    • Try
      • R(E);
      • Threat
        • R1(E),XP(i)
      • Vars
        • K(g);N_SPINS(j),OGATEB,P-FLIGHT,XP(C)::B(F)+R(E),DCHECK
        • P(i);N_GUARD,SBLOCK,XP(C)::QAR1(B),XS(f)
      • Refutation
        • S(f);
    • Try
      • R(E);P_PINP(i),XP(k)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::R1(E),XP(i)
        • S(f);::R1(E),XP(i)
      • Refutation
        • S(f);CHECK,N_SPINP(i),XR(E)
    • Try
      • P(C);
      • Threat
        • R(E)
      • Vars
        • R(a);N_GUARD::QAR1(B),XP(c)
        • S(f);S_CUTR(a)::QAR1(B),XP(c)
      • Refutation
        • P(k);XP(C)
  • Actual
    • P(C);XP(i)
    • Threat
      • QAR1(B),XS(f)
    • Vars
      • K(g);N_SPINS(j),OGATEB,P-FLIGHT,P_SPINS(f),XP(C)::R1(E),XP(k)
      • R(a);N_GUARD::QAR1(B),XP(c)
      • S(f);::R(E)
      • S(f);S_CUTR(a)::QAR1(B),XP(c)
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