MESON Chess Problem Database

Problem Display
PID: 103300 (7Q/B7/5P2/8/3p2PN/7p/3K2R1/7k w - - 0 1)

Marandiuk, Mikhail Nazarovich

Chervoni Girnik, 1979

7Q/B7/5P2/8/3p2PN/7p/3K2R1/7k

#2

7 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...hxg2
      • 2.Sf3#
  • Tries
    • 1.Kd3?
      • 1...hxg2
        • 2.Sf3#
      • 1...h2!
    • 1.Sf3?
      • threat
        • 2.Rg1#
        • 2.Rh2#
        • 2.Qxh3#
      • 1...h2
        • 2.Rg1#
        • 2.Rxh2#
        • 2.Qxh2#
      • 1...Kxg2!
    • 1.Sf5?
      • threat
        • 2.Qxh3#
      • 1...h2
        • 2.Qxh2#
      • 1...Kxg2!
    • 1.Sg6?
      • threat
        • 2.Qxh3#
      • 1...h2
        • 2.Qxh2#
      • 1...Kxg2!
    • 1.Bxd4?
      • 1...hxg2
        • 2.Sf3#
        • 2.Sf5#
        • 2.Sg6#
      • 1...h2!
    • 1.Rg1+?
      • 1...Kh2
        • 2.Sf3#
      • 1...Kxg1!
    • 1.Re2?
      • 1...h2
        • 2.Re1#
      • 1...d3
        • 2.Qa8#
      • 1...Kg1!
    • 1.Rg3?
      • 1...h2
        • 2.Qa8#
      • 1...d3
        • 2.Rxh3#
      • 1...Kh2!
    • 1.Qh7?
      • threat
        • 2.Qb1#
      • 1...hxg2
        • 2.Sf3#
      • 1...d3!
    • 1.Qb8?
      • threat
        • 2.Qh2#
        • 2.Qb1#
      • 1...h2
        • 2.Qxh2#
        • 2.Qb1#
      • 1...hxg2!
    • 1.f7?
      • 1...hxg2
        • 2.Sf3#
      • 1...d3
        • 2.Qa1#
      • 1...h2!
  • Keys
    • 1.Qa8!
      • 1...hxg2
        • 2.Qxg2#
      • 1...h2
        • 2.Rg3#
      • 1...d3
        • 2.Re2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XR(B)::QAR(G)+S(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);SBLOCK,XR(B)::QAR(G)+S(D)
      • Refutation
        • P(b);
    • Try
      • S(D);P_PINP(b)
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XR(B)
    • Try
      • S(D);P_PINP(b)
      • Threat
        • QAR2(G),XP(b)
      • Vars
        • P(b);OGATE::QAR1(G),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XR(B)
    • Try
      • S(D);P_PINP(b)
      • Threat
        • QAR2(G),XP(b)
      • Vars
        • P(b);OGATE::QAR1(G),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XR(B)
    • Try
      • B(F);XP(c)
      • Refutation
        • P(b);
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::S(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c),XR(B)
    • Try
      • R(B);
      • Vars
        • P(b);SBLOCK::R(B)
        • P(c);::QAB(G)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(c)
    • Try
      • R(B);
      • Vars
        • P(b);SBLOCK::QAB(G)
        • P(c);::R(B),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR(G)
      • Vars
        • P(b);SBLOCK,XR(B)::QAR(G)+S(D)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);XR(B)
    • Try
      • P(E);
      • Vars
        • P(b);SBLOCK,XR(B)::QAR(G)+S(D)
        • P(c);OGATE::QAB1(G)
      • Refutation
        • P(b);
  • Actual
    • Q(G);
    • Vars
      • P(b);OGATE,P_SPINP(b),XR(B)::QAB1(G),XP(b)
      • P(b);SBLOCK::QAB(G)+R(B)
      • P(c);::QAB(G)+R(B)
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