MESON Chess Problem Database

Problem Display
PID: 266412 (6q1/1P2p2r/2B5/p2PPPBP/Nk3K1R/2ppNPP1/Q6p/4r2R w - - 0 1)

Rosner, Eugene David

The Problemist, 1997

6q1/1P2p2r/2B5/p2PPPBP/Nk3K1R/2ppNPP1/Q6p/4r2R

#2

15 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Sxd5#
    • 1...Qe6
      • 2.b8Q#
      • 2.b8R#
    • 1...Qf7
      • 2.b8Q#
      • 2.b8R#
    • 1...Qxg5+
      • 2.Kxg5#
    • 1...Qg6
      • 2.b8Q#
      • 2.b8R#
    • 1...Qg7
      • 2.b8Q#
      • 2.b8R#
    • 1...Rb1
      • 2.Rxb1#
    • 1...Rxe3
      • 2.Kxe3#
      • 2.Rb1#
    • 1...Rxh5
      • 2.Bxe7#
    • 1...Rh8
      • 2.Bxe7#
    • 1...c2
      • 2.Qb2#
    • 1...d2
      • 2.Sc2#
  • Tries
    • 1.Ke4?
      • threat
        • 2.Kxd3#
      • 1...Qxd5+
        • 2.Kxd5#
      • 1...Rxe3+
        • 2.Kxe3#
      • 1...Qxg5
        • 2.b8Q#
        • 2.b8R#
      • 1...Rxh5
        • 2.Bxe7#
      • 1...d2
        • 2.Kd3#
      • 1...Rd1!
    • 1.Qb1+?
      • 1...Ka3
        • 2.Sc4#
      • 1...Rxb1!
  • Keys
    • 1.Kg4!
      • threat
        • 2.Kh3#
      • 1...Qxg5+
        • 2.Kxg5#
      • 1...Qxd5
        • 2.Sxd5#
      • 1...Rxe3
        • 2.Rb1#
      • 1...Rxh5
        • 2.Kxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(i);XP(I)::S(C),XQ(i)
    • Q(i);N_GUARD::P=Q
    • Q(i);N_GUARD,P_PINP(K)::P=Q
    • Q(i);CHECK,XB(L)::R(H)+K(G),XQ(i)
    • R(a);OGATE::R(A),XR(a)
    • R(h);N_GUARD,XP(M)::B(L),XP(g)
    • R(h);N_GUARD::B(L),XP(g)
    • P(c);N_GUARD::QAR2(B)
    • P(d);N_GUARD::S(C)
  • Tries
    • Try
      • K(G);P-FLIGHT,P_SPINS(C)
      • Threat
        • R(H)+K(G),XP(d)
      • Vars
        • Q(i);CHECK,XP(I)::R(H)+K(G),XQ(i)
        • R(a);CHECK,XS(C)::R(H)+K(G),XR(a)
        • Q(i);N_GUARD,XB(L)::P=Q
        • R(h);N_GUARD,XP(M)::B(L),XP(g)
        • P(d);::R(H)+K(G)
      • Refutation
        • R(a);N_PINS(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);N_GUARD,S_CUTR(a),S_FLIGHT::S(C)
      • Refutation
        • R(a);XQ(B)
  • Actual
    • K(G);P-FLIGHT,P_SPINB(L)
    • Threat
      • R(H)+K(G)
    • Vars
      • Q(i);CHECK,XB(L)::R(H)+K(G),XQ(i)
      • Q(i);N_PINB(L),XP(I)::S(C),XQ(i)
      • R(a);OGATE,XS(C)::R(A)
      • R(h);XP(M)::R(H)+K(G),XR(h)
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