MESON Chess Problem Database

Problem Display
PID: 229000 (b7/6Np/K3N2r/p6P/P2Bk3/1Q1RP1R1/5rp1/1B3qn1 w - - 0 1)

Simkhovich, Froim Markovich

2nd Prize, Shakhmaty, 1926

b7/6Np/K3N2r/p6P/P2Bk3/1Q1RP1R1/5rp1/1B3qn1

#2

11 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3+
      • 2.Bxd3#
    • 1...Rxe6+
      • 2.Qxe6#
    • 1...Bc6
      • 2.Sc5#
      • 2.Sg5#
    • 1...Bb7+
      • 2.Qxb7#
    • 1...Se2
      • 2.Rd1#
    • 1...Sf3
      • 2.Rg4#
  • Tries
    • 1.Se8?
      • threat
        • 2.Sd6#
      • 1...Qxd3+
        • 2.Bxd3#
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Kf5
        • 2.Sd6#
      • 1...Bb7+!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qc4#
      • 1...Rxe6+
        • 2.Qxe6#
      • 1...Bb7+
        • 2.Qxb7#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Se2
        • 2.Rd1#
      • 1...Sf3
        • 2.Rg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(a);CHECK,OGATE,P_SPINQ(a),XR(C)::B(A),XQ(a)
    • R(g);CHECK,OGATE,XS(J)::QAR2(B),XR(g)
    • B(i);CHECK,N_GUARD::QAB(B),XB(i)
    • S(b);N_PINR(C)::B(A)+R(C)
    • S(b);SBLOCK,S_CUTR(c)::R(E)
  • Tries
    • Try
      • S(K);
      • Threat
        • S(K)
      • Vars
        • Q(a);CHECK,OGATE,P_SPINQ(a),XR(C)::B(A),XQ(a)
        • R(g);CHECK,OGATE,XS(J)::QAR2(B),XR(g)
        • K(e);S_FLIGHT::S(K)
      • Refutation
        • B(i);CHECK
  • Actual
    • B(G);
    • Threat
      • QAR2(B)
    • Vars
      • R(g);CHECK,OGATE,XS(J)::QAR2(B),XR(g)
      • B(i);CHECK,N_GUARD::QAB(B),XB(i)
      • B(i);N_GUARD::QAB1(B),XB(i)
      • S(b);N_PINR(C)::B(A)+R(C)
      • S(b);SBLOCK,S_CUTR(c)::R(E)
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