MESON Chess Problem Database

Problem Display
PID: 92927 (8/7Q/8/8/1pN2P2/1K3R2/1P2pn2/4k3 w - - 0 1)

Asplund, Per Ivan Rune

HM., Tidskrift for Schack, 1951

8/7Q/8/8/1pN2P2/1K3R2/1P2pn2/4k3

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd1
      • 2.Qb1#
    • 1...Kf1
      • 2.Qh1#
    • 1...Sd1
      • 2.Qh1#
    • 1...Sh1
      • 2.Qb1#
      • 2.Qxh1#
    • 1...Sd3
      • 2.Qh1#
    • 1...Sh3
      • 2.Qb1#
    • 1...Se4
      • 2.Qh1#
    • 1...Sg4
      • 2.Qb1#
      • 2.Qh1#
  • Tries
    • 1.Ka2?
      • 1...Kd1
        • 2.Qb1#
      • 1...Kf1
        • 2.Qh1#
      • 1...Sd1
        • 2.Qh1#
      • 1...Sh1
        • 2.Qb1#
        • 2.Qxh1#
      • 1...Sd3
        • 2.Qh1#
      • 1...Sh3
        • 2.Qb1#
      • 1...Se4
        • 2.Qh1#
      • 1...Sg4
        • 2.Qb1#
        • 2.Qh1#
      • 1...b3+!
    • 1.Ka4?
      • 1...Kd1
        • 2.Qb1#
      • 1...Kf1
        • 2.Qh1#
      • 1...Sd1
        • 2.Qh1#
      • 1...Sh1
        • 2.Qb1#
        • 2.Qxh1#
      • 1...Sd3
        • 2.Qh1#
      • 1...Sh3
        • 2.Qb1#
      • 1...Se4
        • 2.Qh1#
      • 1...Sg4
        • 2.Qb1#
        • 2.Qh1#
      • 1...b3!
    • 1.Kxb4?
      • 1...Kd1
        • 2.Qb1#
      • 1...Kf1
        • 2.Qh1#
      • 1...Sd1
        • 2.Qh1#
      • 1...Sh1
        • 2.Qb1#
        • 2.Qxh1#
      • 1...Sh3
        • 2.Qb1#
      • 1...Se4
        • 2.Qh1#
      • 1...Sg4
        • 2.Qb1#
        • 2.Qh1#
      • 1...Sd3+!
    • 1.Rxf2?
      • 1...Kd1
        • 2.Qb1#
      • 1...Kxf2!
    • 1.Qc2?
      • 1...Sd1
        • 2.Qd2#
      • 1...Sh1
        • 2.Qb1#
        • 2.Qc1#
        • 2.Qd2#
      • 1...Sd3
        • 2.Qd2#
      • 1...Sh3
        • 2.Qb1#
        • 2.Qc1#
        • 2.Qd2#
      • 1...Se4
        • 2.Qb1#
        • 2.Qc1#
      • 1...Sg4
        • 2.Qb1#
        • 2.Qc1#
        • 2.Qd2#
      • 1...Kf1!
    • 1.Qg6?
      • threat
        • 2.Qg1#
      • 1...Kd1
        • 2.Qb1#
      • 1...Sh3
        • 2.Qb1#
      • 1...Sg4
        • 2.Qb1#
      • 1...Kf1!
    • 1.Qh4?
      • 1...Kf1
        • 2.Qxf2#
        • 2.Qh1#
      • 1...Kd1!
  • Keys
    • 1.Qa7!
      • 1...Kd1
        • 2.Qa1#
      • 1...Kf1
        • 2.Qxf2#
      • 1...Sh3
        • 2.Qa1#
      • 1...Sd1
        • 2.Qg1#
      • 1...Sh1
        • 2.Qg1#
        • 2.Qa1#
      • 1...Sd3
        • 2.Qg1#
      • 1...Se4
        • 2.Qg1#
        • 2.Qa1#
      • 1...Sg4
        • 2.Qg1#
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 5
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(F)
    • K(a);P-FLIGHT,P_SPINS(c)::QAR2(F)
    • S(c);N_GUARD,SBLOCK::QAR(F)
    • S(c);N_GUARD::QAR(F)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
        • K(a);P-FLIGHT,P_SPINS(c)::QAR2(F)
        • S(c);N_GUARD,SBLOCK::QAR(F)
        • S(c);N_GUARD::QAR(F)
      • Refutation
        • P(d);CHECK
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
        • K(a);P-FLIGHT,P_SPINS(c)::QAR2(F)
        • S(c);N_GUARD,SBLOCK::QAR(F)
        • S(c);N_GUARD::QAR(F)
      • Refutation
        • P(d);
    • Try
      • K(B);P-FLIGHT,XP(d)
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
        • K(a);P-FLIGHT,P_SPINS(c)::QAR2(F)
        • S(c);N_GUARD,SBLOCK::QAR(F)
        • S(c);N_GUARD::QAR(F)
      • Refutation
        • S(c);CHECK
    • Try
      • R(C);XS(c)
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(F);
      • Vars
        • S(c);::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(c)
    • Try
      • Q(F);
      • Threat
        • QAR2(F)
      • Vars
        • K(a);P-FLIGHT::QAR2(F)
        • S(c);N_GUARD::QAR(F)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(c)
    • Try
      • Q(F);P_PINS(c)
      • Refutation
        • K(a);N_SPINS(c),P-FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);P-FLIGHT::QAR(F)
      • K(a);P-FLIGHT,P_SPINS(c)::QAR1(F),XS(c)
      • S(c);N_GUARD::QAR(F)
      • S(c);OGATE,SBLOCK::QAR2(F)
      • S(c);OGATE::QAR2(F)
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Developed and maintained by Brian Stephenson.
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