MESON Chess Problem Database

Problem Display
PID: 93178 (8/4K3/2B3p1/3pk1p1/5RP1/2r5/1N6/5Q2 w - - 0 1)

Balslev, Ole

Skakbladet, 1964

8/4K3/2B3p1/3pk1p1/5RP1/2r5/1N6/5Q2

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Sd3#
    • 1...Rc2
      • 2.Sd3#
    • 1...Rd3
      • 2.Sxd3#
    • 1...Rc4
      • 2.Sd3#
    • 1...Rc5
      • 2.Sd3#
    • 1...Rxc6
      • 2.Sd3#
    • 1...d4
      • 2.Re4#
  • Tries
    • 1.Sc4+?
      • 1...dxc4
        • 2.Re4#
      • 1...Rxc4!
    • 1.Re4+?
      • 1...dxe4
        • 2.Qf6#
      • 1...Kxe4!
    • 1.Qe2+?
      • 1...Re3
        • 2.Sd3#
        • 2.Qxe3#
      • 1...Kxf4!
    • 1.Qd1?
      • threat
        • 2.Qd4#
      • 1...gxf4
        • 2.Qxd5#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Rc4
        • 2.Sd3#
      • 1...d4
        • 2.Re4#
        • 2.Qxd4#
      • 1...Kxf4!
    • 1.Qe1+?
      • 1...Re3
        • 2.Sd3#
        • 2.Qxe3#
      • 1...Kxf4!
    • 1.Qf2?
      • threat
        • 2.Qd4#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Re3
        • 2.Qxe3#
      • 1...Rc4
        • 2.Sd3#
      • 1...d4
        • 2.Re4#
        • 2.Qxd4#
      • 1...gxf4!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qd4#
      • 1...Rxc4
        • 2.Sd3#
      • 1...dxc4
        • 2.Re4#
      • 1...gxf4
        • 2.Qxd5#
      • 1...d4
        • 2.Re4#
        • 2.Qxd4#
      • 1...Rd3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::S(B)
    • R(a);N_GUARD::S(B),XR(a)
    • R(a);N_GUARD,XB(E)::S(B)
    • P(b);N_GUARD::R1(C)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(b);XS(B)::R1(C)
      • Refutation
        • R(a);XS(B)
    • Try
      • R(C);CHECK
      • Vars
        • P(b);XR(C)::QAB1(A)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b),XR(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(d);SBLOCK,XR(C)::QAR1(A),XP(b)
        • R(a);N_GUARD::S(B),XR(a)
        • R(a);N_GUARD::S(B)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(a);N_GUARD::S(B),XR(a)
        • R(a);N_GUARD::QAR2(A),XR(a)
        • R(a);N_GUARD::S(B)
      • Refutation
        • P(d);XR(C)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(a);N_GUARD,XQ(A)::S(B)
      • P(b);N_GUARD,XQ(A)::R1(C)
      • P(d);SBLOCK,XR(C)::QAR1(A),XP(b)
      • R(a);N_GUARD::S(B),XR(a)
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