MESON Chess Problem Database

Problem Display
PID: 176269 (8/8/B1K2Q2/8/8/4k3/2Rn1nR1/8 w - - 0 1)

Savic, Branimir

Schach-Echo, 1971

8/8/B1K2Q2/8/8/4k3/2Rn1nR1/8

#2

5 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Re2#
    • 1...Sf1
      • 2.Re2#
    • 1...Sb3
      • 2.Re2#
    • 1...Sf3
      • 2.Re2#
    • 1...Sde4
      • 2.Re2#
    • 1...Sd1
      • 2.Re2#
    • 1...Sh1
      • 2.Re2#
    • 1...Sh3
      • 2.Re2#
    • 1...Sfe4
      • 2.Re2#
    • 1...Sg4
      • 2.Re2#
  • Tries
    • 1.Kd5?
      • threat
        • 2.Qxf2#
      • 1...Sc4
        • 2.Rg3#
      • 1...Sf3
        • 2.Re2#
      • 1...Sde4
        • 2.Re2#
      • 1...Sd1
        • 2.Re2#
      • 1...Sh1
        • 2.Rc3#
        • 2.Re2#
      • 1...Sh3
        • 2.Rc3#
        • 2.Re2#
      • 1...Sfe4
        • 2.Re2#
      • 1...Sg4
        • 2.Rc3#
        • 2.Re2#
      • 1...Sd3!
    • 1.Rxd2?
      • threat
        • 2.Re2#
      • 1...Ke4
        • 2.Re2#
      • 1...Kxd2!
    • 1.Rxf2?
      • threat
        • 2.Re2#
        • 2.Qf4#
      • 1...Ke4
        • 2.Re2#
        • 2.Qf4#
      • 1...Sf3
        • 2.Rce2#
        • 2.Rfe2#
      • 1...Se4
        • 2.Rce2#
        • 2.Rfe2#
        • 2.Rf3#
      • 1...Sc4!
    • 1.Rg3+?
      • 1...Sf3
        • 2.Re2#
      • 1...Ke4!
  • Keys
    • 1.Qe5+!
      • 1...Kf3
        • 2.Rg3#
      • 1...Sde4
        • 2.Rg3#
      • 1...Sfe4
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • S(a);OGATE::R1(A)
    • S(a);OGATE,SBLOCK::R1(A)
    • S(b);OGATE::R1(B)
    • S(b);OGATE,SBLOCK::R1(B)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAB1(E),XS(b)
      • Vars
        • S(a);N_GUARD::R(B)
        • S(a);OGATE::R1(A)
        • S(b);OGATE::R1(B)
      • Refutation
        • S(b);
    • Try
      • R(A);XS(a)
      • Threat
        • R1(A)
      • Vars
        • K(c);P-FLIGHT::R(A)
      • Refutation
        • K(c);P_SPINS(b),S_FLIGHT,XR(A)
    • Try
      • R(B);XS(b)
      • Threat
        • DUALS(2)
      • Refutation
        • S(a);
    • Try
      • R(B);CHECK
      • Vars
        • S(a);OGATE,P_SPINS(a)::R1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(E);CHECK
    • Vars
      • K(c);P-FLIGHT::R1(B)
      • S(a);P_SPINS(a)::R(B)
      • S(b);P_SPINS(b)::R(A)
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