MESON Chess Problem Database

Problem Display
PID: 229078 (4R3/B1p5/K2pN1pp/1prP1P1r/2p1B1R1/4k1p1/Q6b/7N w - - 0 1)

van Dijk, Johannes

Noord-Hollandsch Dagblad, 1926

4R3/B1p5/K2pN1pp/1prP1P1r/2p1B1R1/4k1p1/Q6b/7N

#2

10 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...g2
      • 2.Qf2#
  • Tries
    • 1.Sxg3?
      • threat
        • 2.Sf1#
        • 2.Qe2#
      • 1...Rxf5
        • 2.Qe2#
      • 1...Bxg3!
    • 1.Sxc5?
      • threat
        • 2.Bg2#
      • 1...Kd4
        • 2.Qd2#
      • 1...dxc5
        • 2.Bxc5#
      • 1...g2
        • 2.Qf2#
      • 1...Rxf5!
    • 1.Bd3?
      • threat
        • 2.Qe2#
      • 1...Kf3
        • 2.Qe2#
      • 1...cxd3
        • 2.Sd4#
        • 2.Sg5#
      • 1...Kxd3!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Bb1#
      • 1...Rc6+
        • 2.Sxc6#
      • 1...Kxd4
        • 2.Qd2#
      • 1...Rxd5
        • 2.Qe2#
      • 1...Rxf5
        • 2.Bxf5#
      • 1...g2
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAB1(B)
  • Tries
    • Try
      • S(A);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XP(F)::QAR1(B)
      • Refutation
        • B(a);XS(A)
    • Try
      • S(H);XR(f)
      • Threat
        • R(J)+B(C)
      • Vars
        • K(b);S_FLIGHT::QAR2(B)
        • P(h);OGATE,P_SPINP(h),XS(H)::B(I),XP(h)
        • P(c);N_GUARD::QAB1(B)
      • Refutation
        • R(g);XP(F)
    • Try
      • B(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);N_SPINR(f),P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);N_SPINR(f),P-FLIGHT,XB(C)
  • Actual
    • S(H);N_PINR(f)
    • Threat
      • R(J)+B(C)
    • Vars
      • R(f);CHECK::B(I)+S(H),XR(f)
      • K(b);P_SPINR(f),S_FLIGHT,XS(H)::QAR2(B)
      • R(f);XP(E)::QAR1(B)
      • R(g);OGATE,XP(F)::R(J)+B(C),XR(g)
      • P(c);N_GUARD::QAB1(B)
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