MESON Chess Problem Database

Problem Display
PID: 183681 (2K2Nr1/1P2PQPp/R2B3k/5PpB/1b5N/2P1r3/7R/5b2 w - - 0 1)

Niemeijer, Meindert

Weenink, Henri Gerard Maria

Revista Romana de Sah, 1926

2K2Nr1/1P2PQPp/R2B3k/5PpB/1b5N/2P1r3/7R/5b2

#2

13 + 7

16055 HGM Weenink (Euwe/Niemeijer/Rueb/Trotsenburg) 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf8+
      • 2.gxf8Q#
      • 2.gxf8B#
    • 1...gxh4
      • 2.Bf4#
    • 1...g4
      • 2.Bf4#
  • Tries
    • 1.Bxb4+?
      • 1...Re6
        • 2.Rxe6#
      • 1...Bxa6!
    • 1.Bc5+?
      • 1...Re6
        • 2.Rxe6#
      • 1...Bxa6!
    • 1.Be5+?
      • 1...Bd6
        • 2.Rxd6#
      • 1...Bxa6!
  • Keys
    • 1.Be2!
      • threat
        • 2.Qf6#
      • 1...Rxc3+
        • 2.Bc5#
      • 1...Rxf8+
        • 2.gxf8Q#
        • 2.gxf8B#
      • 1...Rxe2
        • 2.Sg2#
      • 1...Rxg7
        • 2.Qh5#
      • 1...Bxe2
        • 2.Sf3#
      • 1...Bxc3
        • 2.Be5#
      • 1...g4
        • 2.Bf4#
      • 1...Rf3
        • 2.Bxb4#
        • 2.Bc5#
      • 1...Re6
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(g);CHECK,OGATE,XS(M)::PXR(g)=Q
    • P(d);XS(C)::R(F)+B(G),DCHECK
    • P(d);::R(F)+B(G),DCHECK
  • Tries
    • Try
      • B(G);CHECK,XB(c)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::R(F),XR(b)
      • Refutation
        • B(a);P_PINP(H),XR(F)
    • Try
      • B(G);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::R(F),XR(b)
      • Refutation
        • B(a);P_PINP(H),XR(F)
    • Try
      • B(G);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::R(F),XB(c)
      • Refutation
        • B(a);P_PINP(H),XR(F)
  • Actual
    • B(E);
    • Threat
      • QAR2(J)
    • Vars
      • R(b);CHECK,N_GUARD,XP(B)::R(F)+B(G)
      • R(g);CHECK,OGATE,XS(M)::PXR(g)=Q
      • R(b);N_GUARD,XB(E)::R(A)+S(C)
      • R(g);N_PINS(M),SBLOCK,XP(K)::QAR1(J)
      • B(a);N_GUARD,XB(E)::R(A)+S(C)
      • B(c);N_GUARD,XP(B)::R(F)+B(G)
      • P(d);::R(F)+B(G),DCHECK
      • R(b);N_GUARD::R(A)+S(C)
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