MESON Chess Problem Database

Problem Display
PID: 196824 (8/4R3/3p4/1Bpkp1K1/2p3p1/3r2B1/4Q1N1/8 w - - 0 1)

Krekelberg, HPEA

Nieuws van den Dag von Ned. Indie, 1919

8/4R3/3p4/1Bpkp1K1/2p3p1/3r2B1/4Q1N1/8

#2

6 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qxc4#
    • 1...Rd2
      • 2.Qxc4#
    • 1...Ra3
      • 2.Qxc4#
    • 1...Rb3
      • 2.Qxc4#
    • 1...Re3
      • 2.Qxc4#
    • 1...Rf3
      • 2.Qxc4#
    • 1...Rxg3
      • 2.Qxc4#
    • 1...c3
      • 2.Qxd3#
    • 1...e4
      • 2.Qxe4#
  • Tries
    • 1.Sf4+?
      • 1...exf4
        • 2.Qe4#
      • 1...Kd4!
    • 1.Bxe5?
      • threat
        • 2.Sf4#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Re3
        • 2.Qxc4#
      • 1...Rf3
        • 2.Qxc4#
      • 1...Rd4!
    • 1.Rxe5+?
      • 1...dxe5
        • 2.Qxe5#
      • 1...Kd4!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Qxe5#
      • 1...Kd4
        • 2.Qxe5#
      • 1...Ke6
        • 2.Sf4#
      • 1...Rxg3
        • 2.Qxc4#
      • 1...Re3
        • 2.Qxc4#
      • 1...e4
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(a);OGATE::QAB1(A),XP(b)
    • R(a);OGATE,XB(C)::QAB1(A),XP(b)
    • P(b);N_GUARD::QAR2(A),XR(a)
    • P(f);::QAB1(A),XP(f)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(f);XS(B)::QAB1(A)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(C);XP(f)
      • Threat
        • S(B)
      • Vars
        • P(g);OGATE,XB(C)::QAR1(A),XP(g)
        • R(a);OGATE::QAB1(A),XP(b)
      • Refutation
        • R(a);
    • Try
      • R(F);CHECK,XP(f)
      • Vars
        • P(g);OGATE,XR(F)::QAR1(A),XP(g)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • R(F);P_PINP(g)
    • Threat
      • QAR1(A),XP(f)
    • Vars
      • K(e);P-FLIGHT::QAB1(A),XP(f)
      • K(e);N_SPINP(g),P_SPINP(f),S_FLIGHT::S(B)
      • R(a);OGATE,XB(C)::QAB1(A),XP(b)
      • R(a);OGATE::QAB1(A),XP(b)
      • P(f);::R1(F),XP(g)
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