MESON Chess Problem Database

Problem Display
PID: 109185 (8/3p1p2/3B1P1p/4p2R/7Q/5kp1/3P4/4K3 w - - 0 1)

Podushkin, S

Na Smenu!, 1963

8/3p1p2/3B1P1p/4p2R/7Q/5kp1/3P4/4K3

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg2
      • 2.Qh1#
    • 1...g2
      • 2.Rf5#
    • 1...e4
      • 2.Qxg3#
  • Tries
    • 1.Rxe5?
      • threat
        • 2.Qe4#
      • 1...g2
        • 2.Re3#
        • 2.Rf5#
      • 1...Kg2!
    • 1.Rg5?
      • threat
        • 2.Rxg3#
      • 1...Kg2
        • 2.Rxg3#
      • 1...g2
        • 2.Rg3#
        • 2.Rf5#
        • 2.Qg4#
      • 1...hxg5!
    • 1.Rxh6?
      • 1...Kg2
        • 2.Qh1#
      • 1...e4
        • 2.Qxg3#
      • 1...g2!
    • 1.Qh3?
      • 1...Kf4
        • 2.Qf5#
      • 1...e4
        • 2.Rf5#
        • 2.Qxg3#
      • 1...Ke4!
    • 1.d3?
      • threat
        • 2.Qe4#
      • 1...Kg2
        • 2.Qh1#
      • 1...Ke3
        • 2.Qe4#
      • 1...e4
        • 2.Qxg3#
        • 2.Qxe4#
      • 1...g2!
  • Keys
    • 1.Qc4!
      • 1...Kg2
        • 2.Qf1#
      • 1...e4
        • 2.Qe2#
      • 1...g2
        • 2.Rh3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(C)
    • P(b);SBLOCK::R(D)
    • P(c);SBLOCK::QAR1(C),XP(b)
  • Tries
    • Try
      • R(D);XP(c)
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);
      • Threat
        • R1(D),XP(b)
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::R1(D),XP(b)
      • Refutation
        • P(d);XR(D)
    • Try
      • R(D);XP(d)
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • P(c);SBLOCK::QAR1(C),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(C);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT,P_SPINP(c)::QAR1(C)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • P(B);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • P(c);::QAB1(C)
      • P(b);OGATEB,SBLOCK::R(D)
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