MESON Chess Problem Database

Problem Display
PID: 120081 (8/5K2/8/8/Q7/3p1p2/R2PPP1R/4k3 w - - 0 1)

Pachman, Vladimir

Ruch, 1947

8/5K2/8/8/Q7/3p1p2/R2PPP1R/4k3

#2

7 + 3

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf1
      • 2.Qd1#
  • Tries
    • 1.Ra1+?
      • 1...Kxe2
        • 2.Qd1#
      • 1...Kxd2!
    • 1.Rb2?
      • 1...Kf1
        • 2.Qd1#
      • 1...dxe2
        • 2.Qa1#
      • 1...fxe2
        • 2.Qa1#
      • 1...Kxe2!
    • 1.Qb3?
      • 1...Kf1
        • 2.Qd1#
      • 1...dxe2
        • 2.Qb1#
      • 1...fxe2
        • 2.Qb1#
      • 1...Kxe2!
    • 1.exd3?
      • 1...Kf1
        • 2.Qd1#
      • 1...Ke2!
    • 1.exf3?
      • 1...Kf1
        • 2.Qd1#
      • 1...Ke2!
    • 1.e3?
      • 1...Kf1
        • 2.Qd1#
      • 1...Ke2!
    • 1.e4?
      • 1...Kf1
        • 2.Qd1#
      • 1...Ke2!
  • Keys
    • 1.Qe4!
      • 1...Kd1
        • 2.Rh1#
      • 1...Kf1
        • 2.Ra1#
      • 1...dxe2
        • 2.Qb1#
      • 1...fxe2
        • 2.Qh1#

Anticipated by 17585(1947)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(F)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT,XP(B)
    • Try
      • R(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
        • P(b);SBLOCK,XP(C)::QAR(F)
        • P(c);SBLOCK,XP(C)::QAR(F)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
        • P(b);SBLOCK,XP(C)::QAR(F)
        • P(c);SBLOCK,XP(C)::QAR(F)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • P(C);XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(C);XP(c)
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);P-FLIGHT::R(E)
      • K(a);P-FLIGHT::R(A)
      • P(b);OGATE,P_SPINP(b),SBLOCK,XP(C)::QAR(F)
      • P(c);OGATE,P_SPINP(c),SBLOCK,XP(C)::QAR(F)
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