MESON Chess Problem Database

Problem Display
PID: 93153 (8/7p/1p2pp1K/1P2p2N/3pk3/1Q6/1N3P2/8 w - - 0 1)

Peterson, Emil

Schackvarlden, 1929

8/7p/1p2pp1K/1P2p2N/3pk3/1Q6/1N3P2/8

#2

6 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qf3#
    • 1...d3
      • 2.Qxd3#
    • 1...f5
      • 2.f3#
  • Tries
    • 1.Kxh7?
      • 1...d3
        • 2.Qxd3#
      • 1...f5
        • 2.f3#
      • 1...Kf5!
    • 1.Sd1?
      • 1...Kf5
        • 2.Qf3#
      • 1...f5
        • 2.f3#
      • 1...d3!
    • 1.Sa4?
      • 1...Kf5
        • 2.Qf3#
      • 1...f5
        • 2.f3#
      • 1...d3!
    • 1.Sxf6+?
      • 1...Kf5
        • 2.Qf3#
      • 1...Kf4!
    • 1.Qd1?
      • 1...Kf5
        • 2.Qf3#
      • 1...d3
        • 2.Qxd3#
      • 1...f5
        • 2.Qh1#
      • 1...Kd5!
    • 1.Qc2+?
      • 1...Kd5
        • 2.Qc6#
      • 1...d3
        • 2.Qxd3#
      • 1...Kf3!
    • 1.Qc3?
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Qf3#
      • 1...d3
        • 2.Qxd3#
      • 1...f5
        • 2.Qc6#
      • 1...dxc3!
    • 1.Qg3?
      • 1...Kf5
        • 2.Qf3#
      • 1...d3
        • 2.Qxd3#
      • 1...f5
        • 2.Sf6#
        • 2.Qg2#
      • 1...Kd5!
    • 1.Qh3?
      • 1...d3
        • 2.Qxd3#
      • 1...f5
        • 2.Qg2#
        • 2.Qh1#
      • 1...Kd5!
  • Keys
    • 1.Qa3!
      • 1...Kd5
        • 2.Sxf6#
      • 1...Kf5
        • 2.Qf3#
      • 1...d3
        • 2.Qxd3#
      • 1...f5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR2(C)
    • P(a);::QAB1(C),XP(a)
    • P(f);SBLOCK::P(B)
  • Tries
    • Try
      • K(F);P-FLIGHT,XP(g)
      • Vars
        • P(a);::QAB1(C),XP(a)
        • P(f);SBLOCK::P(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(b);S_FLIGHT::QAR2(C)
        • P(f);SBLOCK::P(B)
      • Refutation
        • P(a);
    • Try
      • S(A);
      • Vars
        • K(b);S_FLIGHT::QAR2(C)
        • P(f);SBLOCK::P(B)
      • Refutation
        • P(a);
    • Try
      • S(E);CHECK,XP(f)
      • Vars
        • K(b);S_FLIGHT::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);S_FLIGHT::QAR2(C)
        • P(a);::QAB1(C),XP(a)
        • P(f);SBLOCK::QAB(C)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • P(a);P_SPINP(a)::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);S_FLIGHT::QAB1(C)
        • K(b);S_FLIGHT::QAR2(C)
        • P(a);::QAB1(C),XP(a)
        • P(f);SBLOCK::QAB(C)
      • Refutation
        • P(a);XQ(C)
    • Try
      • Q(C);
      • Vars
        • K(b);S_FLIGHT::QAR2(C)
        • P(a);::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(a);::QAB1(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::S(E),XP(f)
      • K(b);S_FLIGHT::QAR2(C)
      • P(a);::QAB1(C),XP(a)
      • P(f);SBLOCK::QAB(C)
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