MESON Chess Problem Database

Problem Display
PID: 172205 (5K1k/7b/5R1r/8/8/8/8/5Q2 w - - 0 1)

Andreev, Aleksandr Grigorevich

200 Shakhmatni Zadachi, 1983

5K1k/7b/5R1r/8/8/8/8/5Q2

#2

3 + 3

5454 Near Snap 2018
3713 Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf6+
      • 2.Qxf6#
  • Keys
    • 1.Qa1!
      • threat
        • 2.Rg6#
        • 2.Rxh6#
      • 1...Rxf6+
        • 2.Qxf6#
      • 1...Bb1
        • 2.Rxh6#
      • 1...Bc2
        • 2.Rxh6#
      • 1...Bd3
        • 2.Rxh6#
      • 1...Be4
        • 2.Rxh6#
      • 1...Bf5
        • 2.Rxh6#
      • 1...Bg6
        • 2.Rf7#
      • 1...Bg8
        • 2.Rxh6#
      • 1...Rh1
        • 2.Rf1#
      • 1...Rh2
        • 2.Rf2#
      • 1...Rh3
        • 2.Rf3#
      • 1...Rh4
        • 2.Rf4#
      • 1...Rh5
        • 2.Rf5#
      • 1...Rg6
        • 2.Rxg6#

Anticipated by 184801(1908), 195059(1918), 157484(1965), 178096(1965)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,OGATE,XR(B)::QAB(A),XR(a)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XR(B)::QAB(A),XR(a)
      • B(b);::QAB(A)+R(B),DCHECK,XR(a)
      • B(b);S_CUTR(a)::QAB(A)+R(B)
      • R(a);N_GUARD::QAB(A)+R(B)
      • R(a);::QAB(A)+R(B),XR(a)
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