MESON Chess Problem Database

Problem Display
PID: 169820 (4K3/8/7B/1Q6/3pN3/1Bp5/2P1p3/3k4 w - - 0 1)

Ekstrom, Sven Johan Adrian

Rehn, Gunnar

Schackvarlden, 1945

4K3/8/7B/1Q6/3pN3/1Bp5/2P1p3/3k4

#2

6 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e1S
      • 2.Sf2#
    • 1...e1B
      • 2.Qh5#
    • 1...e1R
      • 2.Qd3#
  • Tries
    • 1.Sxc3+?
      • 1...Ke1
        • 2.Qxe2#
      • 1...dxc3!
    • 1.Ba4?
      • threat
        • 2.Qb1#
      • 1...Ke1
        • 2.Qb1#
      • 1...e1S
        • 2.Sf2#
      • 1...e1B
        • 2.Qh5#
      • 1...e1R
        • 2.Qd3#
      • 1...e1Q!
    • 1.Qh5?
      • 1...Ke1
        • 2.Qh1#
      • 1...d3!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Qb1#
      • 1...Ke1
        • 2.Qb1#
      • 1...Kxc2
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • P(b);SBLOCK::S(C)
    • P(b);OGATEB,SBLOCK::QAB(D)
    • P(b);P_PINS(C),SBLOCK::QAR2(D)
  • Tries
    • Try
      • S(C);CHECK,XP(c)
      • Vars
        • K(a);P-FLIGHT::QAR1(D),XP(b)
      • Refutation
        • P(d);XS(C)
    • Try
      • B(B);
      • Threat
        • QAR2(D)
      • Vars
        • K(a);P-FLIGHT::QAR(D)
        • P(b);SBLOCK::S(C)
        • P(b);OGATEB,SBLOCK::QAB(D)
        • P(b);P_PINS(C),SBLOCK::QAR2(D)
      • Refutation
        • P(b);P_PINS(C)
    • Try
      • Q(D);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR(D)
      • Refutation
        • P(d);
  • Actual
    • B(B);
    • Threat
      • QAR2(D)
    • Vars
      • K(a);P-FLIGHT::QAR(D)
      • K(a);OGATEB,S_FLIGHT,XP(A)::QAB1(D)
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