MESON Chess Problem Database

Problem Display
PID: 180538 (8/1N6/B1N5/P1P5/k1pQ4/p1r1p3/p1P1P3/K3B3 w - - 0 1)

Lider, Valentin Viktorovich

Revista Romana de Sah, 1975

8/1N6/B1N5/P1P5/k1pQ4/p1r1p3/p1P1P3/K3B3

#2

10 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Qxc4#
  • Tries
    • 1.Kxa2?
      • 1...Rb3
        • 2.cxb3#
      • 1...Rd3
        • 2.Qxc4#
      • 1...Rxc2+!
    • 1.Bxc4?
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Rb3
        • 2.cxb3#
      • 1...Rd3
        • 2.Bxd3#
      • 1...Rxc2!
    • 1.Qd1?
      • 1...Rxc2
        • 2.Qxc2#
      • 1...Rd3
        • 2.cxd3#
      • 1...Rb3!
    • 1.Qe4?
      • 1...Rxc2
        • 2.Qxc2#
      • 1...Rd3
        • 2.Qxc4#
      • 1...Rb3!
  • Keys
    • 1.Qd7!
      • 1...Rxc2
        • 2.Sd4#
      • 1...Rb3
        • 2.Sb4#
      • 1...Rd3
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAR2(E),XP(f)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(a)
      • Vars
        • R(c);OGATE::P(C),XR(c)
        • R(c);N_GUARD::QAR2(E),XP(f)
      • Refutation
        • R(c);CHECK,XP(C)
    • Try
      • B(H);XP(f)
      • Vars
        • R(c);OGATE,P_SPINR(c),XB(H)::QAR2(E),XR(c)
        • R(c);OGATE::P(C),XR(c)
        • R(c);N_GUARD::QAR(E)+B(H),XR(c)
      • Refutation
        • R(c);XP(C)
    • Try
      • Q(E);N_PINP(f)
      • Vars
        • R(c);OGATE,P_SPINR(c),XP(C)::QAB(E),XR(c)
        • R(c);OGATE::QAB(E)+P(C),XR(c)
      • Refutation
        • R(c);
    • Try
      • Q(E);
      • Vars
        • R(c);OGATE,XP(C)::QAB(E),XR(c)
        • R(c);N_GUARD::QAR2(E),XP(f)
      • Refutation
        • R(c);
  • Actual
    • Q(E);N_PINP(f)
    • Vars
      • R(c);XP(C)::QAB(E)+S(I)
      • R(c);::QAB(E)+S(I)
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