MESON Chess Problem Database

Problem Display
PID: 168164 (3rnKB1/2pRPNn1/2P1k2q/4P1pp/4P3/bp6/4br2/Q7 w - - 0 1)

Loshinski, Lev Ilich

2nd Prize, Zadachi i Etyudi, 1930

3rnKB1/2pRPNn1/2P1k2q/4P1pp/4P3/bp6/4br2/Q7

#2

9 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Sxg5#
      • 2.Sd6#
      • 2.Sxh6#
      • 2.Sxd8#
      • 2.Sh8#
    • 1...Rh2
      • 2.Sxg5#
      • 2.Sd6#
      • 2.Sxh6#
      • 2.Sxd8#
      • 2.Sh8#
    • 1...Rxf7+
      • 2.Bxf7#
    • 1...Bf3
      • 2.Sxg5#
      • 2.Sd6#
      • 2.Sxh6#
      • 2.Sxd8#
      • 2.Sh8#
    • 1...Bc1
      • 2.exd8S#
    • 1...Bb2
      • 2.exd8S#
    • 1...Bxe7+
      • 2.Rxe7#
    • 1...Sf5+
      • 2.Sxh6#
    • 1...Sd6+
      • 2.exd8S#
    • 1...Sf6+
      • 2.Sxd8#
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qd5#
      • 1...Rxf7+
        • 2.Bxf7#
      • 1...Bxe7+
        • 2.Rxe7#
      • 1...Sf5+
        • 2.Sxh6#
      • 1...Sd6+
        • 2.exd8S#
      • 1...Sf6+
        • 2.Sxd8#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Bc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(b);CHECK,OGATE,P_SPINR(b),XS(G)::B(I),XR(b)
    • B(c);N_PINP(F)::PXR(k)=S
    • B(c);CHECK,OGATE,XP(F)::R1(E),XB(c)
    • S(j);CHECK,N_PINS(G)::B(I)+S(G),XQ(h)
    • S(l);CHECK,N_PINP(F)::PXR(k)=S
    • S(l);CHECK,N_PINS(G)::B(I)+S(G),DCHECK,XR(k)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XS(G)::B(I),XR(b)
      • B(c);CHECK,OGATE,XP(F)::R1(E),XB(c)
      • S(j);CHECK,N_PINS(G)::B(I)+S(G),XQ(h)
      • S(l);CHECK,N_PINP(F)::PXR(k)=S
      • S(l);CHECK,N_PINS(G)::B(I)+S(G),DCHECK,XR(k)
      • R(k);OGATE,XR(E)::QAB1(A),XR(k)
      • B(a);N_GUARD::QAB(A),XB(a)
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