MESON Chess Problem Database

Problem Display
PID: 177845 (3r1r2/4RpB1/b7/5R2/4Pp1N/2ppkP1p/2n1Pp2/3Q1B1K w - - 0 1)

Lider, Valentin Viktorovich

Sahs (Latvia), 1983

3r1r2/4RpB1/b7/5R2/4Pp1N/2ppkP1p/2n1Pp2/3Q1B1K

#2

10 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.exd5#
    • 1...h2
      • 2.Sg2#
  • Tries
    • 1.Rb5?
      • threat
        • 2.Sf5#
      • 1...dxe2
        • 2.Qxe2#
      • 1...Rd5
        • 2.exd5#
      • 1...Sd4
        • 2.Qxd3#
      • 1...f5
        • 2.exf5#
      • 1...Bc8!
    • 1.exd3?
      • threat
        • 2.Qe2#
        • 2.Qc1#
      • 1...Rxd3
        • 2.Qe2#
      • 1...Bxd3
        • 2.Qc1#
      • 1...Sd4
        • 2.Qc1#
      • 1...f6!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Sf5#
      • 1...Rxd5
        • 2.exd5#
      • 1...dxe2
        • 2.Qc1#
      • 1...Bc8
        • 2.Qxd3#
      • 1...Sd4
        • 2.Bxd4#
      • 1...f5
        • 2.exf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(j);OGATE::R(I)+P(F),XR(j)
    • P(f);N_GUARD::S(G)
  • Tries
    • Try
      • R(H);
      • Threat
        • S(G)
      • Vars
        • P(d);OGATE,XP(D)::QAR1(A),XP(d)
        • R(j);OGATE::R(I)+P(F),XR(j)
        • S(a);S_CUTR(j)::QAR1(A),XP(d)
        • P(i);OGATE::R(I)+P(F),XP(i)
      • Refutation
        • B(h);
    • Try
      • P(D);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(j);XP(D)::QAR1(A)
        • B(h);XP(D)::QAB(A)
        • S(a);::QAB(A)
      • Refutation
        • P(i);
  • Actual
    • R(H);
    • Threat
      • S(G)
    • Vars
      • R(j);OGATE,XR(H)::R(I)+P(F),XR(j)
      • P(d);N_GUARD,XP(D)::QAB(A)
      • B(h);N_GUARD::QAR1(A),XP(d)
      • S(a);N_GUARD::B(J),XS(a)
      • P(i);OGATE::R(I)+P(F),XP(i)
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