MESON Chess Problem Database

Problem Display
PID: 264166 (4B3/7N/3pQp2/4b2P/RB2r2k/1R5P/4PP2/5K2 w - - 0 1)

May, Willy Paul

Tijdschrift vd KNSB, 1951

4B3/7N/3pQp2/4b2P/RB2r2k/1R5P/4PP2/5K2

#2

11 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Qg4#
    • 1...Re3
      • 2.Qg4#
    • 1...Rg4
      • 2.Qxg4#
    • 1...Ba1
      • 2.Qxe4#
    • 1...Bb2
      • 2.Qxe4#
    • 1...Bh2
      • 2.Qxf6#
    • 1...Bg3
      • 2.fxg3#
    • 1...Bd4
      • 2.Qxe4#
    • 1...Bf4
      • 2.Qg4#
  • Tries
    • 1.f4?
      • threat
        • 2.Be1#
        • 2.Qg4#
      • 1...Rxe2
        • 2.Qg4#
      • 1...Rxb4
        • 2.Qg4#
      • 1...Bxf4
        • 2.Qg4#
      • 1...Re3
        • 2.Qg4#
      • 1...Bc3
        • 2.Qg4#
      • 1...Bd4
        • 2.Qg4#
      • 1...f5
        • 2.Be1#
      • 1...Rxf4+!
  • Keys
    • 1.Be1!
      • threat
        • 2.f4#
      • 1...Rf4
        • 2.f3#
      • 1...Rg4
        • 2.Rxg4#
        • 2.Qxg4#
      • 1...Bh2
        • 2.Qxf6#
      • 1...Bc3
        • 2.Rxe4#
      • 1...Bg3
        • 2.fxg3#
      • 1...Bd4
        • 2.Qxe4#
      • 1...Bf4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD,XP(B)::QAR1(I)
    • R(a);N_GUARD::QAR1(I)
    • R(a);N_GUARD::QAR1(I),XR(a)
    • B(c);OGATE::QAR(I),XR(a)
    • B(c);N_GUARD::QAB(I),XP(e)
    • B(c);OGATE::P(C),XB(c)
    • B(c);S_CUTR(a)::QAR1(I)
  • Tries
    • Try
      • P(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XP(B)::QAR1(I)
        • R(a);XB(G)::QAR1(I)
        • B(c);XP(C)::QAR1(I)
        • R(a);::QAR1(I)
        • B(c);::QAR1(I)
        • P(e);::B(G)
      • Refutation
        • R(a);CHECK,XP(C)
  • Actual
    • B(G);P_PINR(a)
    • Threat
      • B(G)+P(C)
    • Vars
      • R(a);P_PINP(C),S_CUTB(c)::B(G)+P(C)
      • B(c);N_GUARD::QAB(I),XP(e)
      • B(c);N_GUARD::R(F),XR(a)
      • B(c);OGATE::P(C),XB(c)
      • B(c);N_SPINR(a),OGATE::QAR(I),XR(a)
      • B(c);N_SPINR(a),S_CUTR(a)::QAR1(I)
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