MESON Chess Problem Database

Problem Display
PID: 10363 (Q7/2p1R3/1Nq2P2/3rpR2/1nNBk1P1/2P4K/b2p1p2/3rbB2 w - - 0 1)

Haring, Jacobus

le Grand, Henk

3rd Prize, Tijdschrift vd KNSB, 1963

Q7/2p1R3/1Nq2P2/3rpR2/1nNBk1P1/2P4K/b2p1p2/3rbB2

#2

11 + 11

3747 FIDE Album (1962-1964) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Rexe5#
    • 1...Qb5
      • 2.Rexe5#
    • 1...Qd7
      • 2.Rexe5#
    • 1...Qxc4
      • 2.Rexe5#
    • 1...Qc5
      • 2.Rexe5#
    • 1...Qxb6
      • 2.Rexe5#
    • 1...Rxd4
      • 2.Rexe5#
    • 1...Rd6
      • 2.Rexe5#
    • 1...Rd7
      • 2.Rexe5#
    • 1...Rd8
      • 2.Rexe5#
    • 1...Sd3
      • 2.Bg2#
  • Tries
    • 1.Sb2?
      • threat
        • 2.Bg2#
      • 1...Rxd4
        • 2.Rexe5#
      • 1...Qxc3+!
    • 1.Sxd5?
      • threat
        • 2.Rexe5#
      • 1...Kxd5
        • 2.Rfxe5#
        • 2.Rexe5#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...Qe8
        • 2.Rf4#
      • 1...Qd6
        • 2.Rf4#
      • 1...Sd3
        • 2.Bg2#
      • 1...Qe6!
    • 1.Bxe5?
      • threat
        • 2.Rf4#
      • 1...Rd3+
        • 2.Bg3#
      • 1...Qxc4
        • 2.Bh2#
        • 2.Bg3#
        • 2.Bd4#
        • 2.Bd6#
        • 2.Bxc7#
      • 1...Qxf6
        • 2.Bxf6#
      • 1...Rxe5
        • 2.Rexe5#
      • 1...Sd3
        • 2.Bg2#
      • 1...Bxc4!
    • 1.Qxc6?
      • threat
        • 2.Rexe5#
      • 1...Sd3
        • 2.Bg2#
        • 2.Qxd5#
      • 1...Sxc6!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Bg2#
      • 1...Qxc3+
        • 2.Sf3#
      • 1...Rxd4
        • 2.Sec4#
      • 1...Rxe5
        • 2.Rexe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(j);P_SPINR(h)::R1(J),XP(i)
    • Q(j);P_SPINR(h),XS(D)::R1(J),XP(i)
    • Q(j);P_SPINR(h),XS(H)::R1(J),XP(i)
    • R(h);N_GUARD,P_SPINQ(j),XB(E)::R1(J),XP(i)
    • R(h);N_GUARD,P_SPINQ(j)::R1(J),XP(i)
    • S(f);SBLOCK::B(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • B(A)
      • Vars
        • R(h);N_GUARD,P_SPINQ(j),XB(E)::R1(J),XP(i)
      • Refutation
        • Q(j);CHECK,P_SPINR(h),XP(B)
    • Try
      • S(H);XR(h)
      • Threat
        • R1(J),XP(i)
      • Vars
        • Q(j);XP(I)::QAB(K)+S(H),DCHECK,XQ(j)
        • Q(j);::R1(G)
        • S(f);SBLOCK::B(A)
      • Refutation
        • Q(j);N_SPINP(i)
    • Try
      • B(E);XP(i)
      • Threat
        • R1(G)
      • Vars
        • R(h);CHECK,N_GUARD,P_SPINQ(j)::R(J)+B(E)
        • Q(j);OGATE,P_SPINR(h),XP(I)::R(J)+B(E),XQ(j)
        • R(h);OGATE,P_SPINQ(j),P_SPINR(h),XB(E)::R1(J),XR(h)
        • S(f);SBLOCK::B(A)
      • Refutation
        • B(c);XS(D)
    • Try
      • Q(K);P_PINR(h),XQ(j)
      • Threat
        • R1(J),XP(i)
      • Refutation
        • S(f);N_SPINR(h),XQ(K)
  • Actual
    • S(D);XP(i)
    • Threat
      • B(A)
    • Vars
      • Q(j);CHECK,N_GUARD,P_SPINR(h),XP(B)::R(J)+S(D)
      • R(h);N_GUARD,P_SPINQ(j),XB(E)::R(J)+S(D)
      • R(h);OGATE,P_SPINQ(j),P_SPINR(h),XS(D)::R1(J),XR(h)
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