MESON Chess Problem Database

Problem Display
PID: 244426 (K3NR2/4p3/p2NP1pp/6k1/2p1R2p/r6P/Q2b2b1/Bn1B4 w - - 0 1)

Eerkes, Allard Pieter

Norsk Sjakkblad, 1934

K3NR2/4p3/p2NP1pp/6k1/2p1R2p/r6P/Q2b2b1/Bn1B4

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Qa5#
    • 1...Bc3
      • 2.Qxg2#
    • 1...Be3
      • 2.Qxg2#
    • 1...Bf1
      • 2.Re5#
    • 1...Bxe4+
      • 2.Sxe4#
    • 1...Sc3
      • 2.Qxd2#
    • 1...c3
      • 2.Qd5#
  • Tries
    • 1.Bg4?
      • threat
        • 2.Sf7#
      • 1...Bxe4+
        • 2.Sxe4#
      • 1...exd6
        • 2.Bf6#
      • 1...Rf3!
    • 1.Qxd2+?
      • 1...Re3
        • 2.Qxe3#
        • 2.Qa5#
        • 2.Qd5#
      • 1...Sxd2!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Sf7#
      • 1...Bxe4+
        • 2.Sxe4#
      • 1...exd6
        • 2.Bf6#
      • 1...Rc3
        • 2.Qa5#
      • 1...Rf3
        • 2.Rg4#
      • 1...Bc3
        • 2.Qxg2#
      • 1...Sc3
        • 2.Qxd2#
      • 1...c3
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(d);OGATE::QAR(C)
    • B(b);OGATE::QAR(C),XB(c)
    • B(c);N_PINR(E)::R(E)
    • B(c);CHECK,XR(E)::S(F),XB(c)
    • S(a);N_GUARD,S_CUTR(d)::QAB(C),XB(b)
    • P(e);OGATE::QAR(C)
  • Tries
    • Try
      • B(B);
      • Threat
        • S(F)
      • Vars
        • B(c);CHECK,XR(E)::S(F),XB(c)
        • P(k);N_GUARD,XS(F)::B(A)
      • Refutation
        • R(d);N_PINR(E)
    • Try
      • Q(C);CHECK,XB(b)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • S(I);
    • Threat
      • S(F)
    • Vars
      • B(c);CHECK,XR(E)::S(F),XB(c)
      • P(k);N_GUARD,XS(F)::B(A)
      • R(d);OGATE::QAR(C)
      • R(d);N_PINR(E)::R1(E)
      • B(b);OGATE::QAR(C),XB(c)
      • S(a);N_GUARD,S_CUTR(d)::QAB(C),XB(b)
      • P(e);OGATE::QAR(C)
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