MESON Chess Problem Database

Problem Display
PID: 198836 (2rn1N2/1brR2K1/p4NR1/4kp1p/4p3/1Q2P3/1b6/8 w - - 0 1)

Letzen, Einar

Teplitz-Schonauer Anzeiger, 1921

2rn1N2/1brR2K1/p4NR1/4kp1p/4p3/1Q2P3/1b6/8

#2

7 + 10

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Rd5#
      • 2.Qd5#
    • 1...Rxd7+
      • 2.S6xd7#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bc6
      • 2.Qxb2#
    • 1...Sc6
      • 2.Qd5#
      • 2.Qe6#
    • 1...Se6+
      • 2.Qxe6#
    • 1...Sf7
      • 2.Qe6#
    • 1...f4
      • 2.Rg5#
  • Tries
    • 1.Sg4+?
      • 1...fxg4
        • 2.Rg5#
      • 1...hxg4!
    • 1.Rh6?
      • threat
        • 2.Sg6#
      • 1...Rxd7+
        • 2.S6xd7#
      • 1...Se6+
        • 2.Qxe6#
      • 1...f4
        • 2.Rxh5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Rc4!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qd6#
      • 1...Rxd7+
        • 2.S8xd7#
      • 1...Se6+
        • 2.Qxe6#
      • 1...f4
        • 2.Rg5#
      • 1...Rc6
        • 2.Rd5#
      • 1...Ba3
        • 2.Qd4#
      • 1...Bc6
        • 2.Qxb2#
      • 1...Sc6
        • 2.Qc5#
      • 1...Sf7
        • 2.Qe6#

This anticipates 140802(1923)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(h);CHECK,XR(E)::S(C),XR(h)
    • B(g);N_GUARD::QAR1(A),XB(g)
    • B(g);S_CUTR(h)::QAB(A),XB(a)
    • S(j);CHECK,N_GUARD::QAR1(A),XS(j)
    • S(j);N_GUARD,N_PINR(E)::QAR1(A)
    • P(d);OGATEB::R(D)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • P(d);S_CUTP(e),XS(C)::R(D)
      • Refutation
        • P(e);XS(C)
    • Try
      • R(D);
      • Threat
        • S(G)
      • Vars
        • R(h);CHECK,XR(E)::S(C),XR(h)
        • S(j);CHECK,N_GUARD::QAR1(A),XS(j)
        • P(d);OGATEB::R(D),XP(e)
        • B(g);N_GUARD::QAR1(A),XB(g)
      • Refutation
        • R(h);N_PINR(E)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(h);CHECK,XR(E)::S(G),XR(h)
      • S(j);CHECK,N_GUARD::QAR1(A),XS(j)
      • P(d);OGATEB::R(D)
      • R(h);N_PINR(E)::R1(E)
      • B(a);N_GUARD::QAB1(A)
      • B(g);S_CUTR(h)::QAB(A),XB(a)
      • S(j);S_CUTB(g),S_CUTR(h)::QAR2(A)
      • S(j);N_GUARD,N_PINR(E)::QAR1(A)
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