MESON Chess Problem Database

Problem Display
PID: 206426 (8/1K2p3/1p6/3k1B2/5pP1/B7/PQP1r3/4R3 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

Shakhmaty, 1925

8/1K2p3/1p6/3k1B2/5pP1/B7/PQP1r3/4R3

#2

8 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Be6#
    • 1...Rd2
      • 2.Be6#
    • 1...Rf2
      • 2.Be6#
    • 1...Rg2
      • 2.Be6#
    • 1...Rh2
      • 2.Be6#
    • 1...Re6
      • 2.Bxe6#
  • Tries
    • 1.Rd1+?
      • 1...Kc4
        • 2.Rd4#
        • 2.Qb3#
        • 2.Qb4#
      • 1...Rd2!
    • 1.Rxe2?
      • threat
        • 2.Be6#
      • 1...Kc4
        • 2.Be6#
      • 1...e6
        • 2.Bxe6#
      • 1...e5!
    • 1.Qxb6?
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Qc5#
      • 1...Rxc2
        • 2.Be6#
      • 1...Ke5!
  • Keys
    • 1.c3!
      • threat
        • 2.Qb5#
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke5
        • 2.c4#
      • 1...Rxb2
        • 2.Be6#
      • 1...b5
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD,XP(D)::B(G)
    • R(a);N_GUARD::B(G)
    • R(a);N_GUARD::B(G),XR(a)
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • R(A);XR(a)
      • Threat
        • B(G)
      • Vars
        • K(c);S_FLIGHT::B(G)
        • P(e);::B(G),XP(e)
      • Refutation
        • P(e);
    • Try
      • Q(C);XP(d)
      • Threat
        • QAR1(C)
      • Vars
        • K(c);S_FLIGHT::QAR1(C)
        • R(a);N_GUARD,XP(D)::B(G)
      • Refutation
        • K(c);P-FLIGHT,P_SPINR(a)
  • Actual
    • P(D);
    • Threat
      • QAR2(C)
    • Vars
      • K(c);S_FLIGHT::QAB1(C)
      • K(c);P-FLIGHT,P_SPINR(a)::QAB(C)+P(D)
      • R(a);N_GUARD,XQ(C)::B(G)
      • P(d);::QAR2(C),XP(d)
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