MESON Chess Problem Database

Problem Display
PID: 63423 (B2R4/1n1KP3/2r1NB2/nRPkP1p1/8/3P3p/5Q2/3b2b1 w - - 0 1)

Haring, Jacobus

2nd HM., Het Parool, 1975

B2R4/1n1KP3/2r1NB2/nRPkP1p1/8/3P3p/5Q2/3b2b1

#2

11 + 8

3771 FIDE Album (1974-1976) 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Sc7#
      • 2.Rxc5#
    • 1...Ra6
      • 2.Sc7#
    • 1...Rb6
      • 2.Sc7#
      • 2.cxb6#
    • 1...Rd6+
      • 2.cxd6#
    • 1...Rc7+
      • 2.Sxc7#
    • 1...Bc2
      • 2.Qf3#
    • 1...Bb3
      • 2.Qf3#
    • 1...Bf3
      • 2.Qxf3#
    • 1...Ba4
      • 2.Qf3#
    • 1...Bh2
      • 2.Qd4#
    • 1...Sxc5+
      • 2.Rxc5#
    • 1...Sd6
      • 2.Sc7#
      • 2.cxd6#
    • 1...Sxd8
      • 2.Sc7#
    • 1...g4
      • 2.Sf4#
  • Tries
    • 1.Ke8+?
      • 1...Rd6
        • 2.Rxd6#
      • 1...Sd6+
        • 2.Rxd6#
      • 1...Sxd8
        • 2.Sc7#
      • 1...Kxe6!
    • 1.Qe3?
      • threat
        • 2.Qe4#
      • 1...Rd6+
        • 2.cxd6#
      • 1...Rc7+
        • 2.Sxc7#
      • 1...Sxc5+
        • 2.Rxc5#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Sd6
        • 2.Sc7#
        • 2.cxd6#
      • 1...Bxe3!
    • 1.Qg2+?
      • 1...Bf3
        • 2.Qxf3#
      • 1...hxg2!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qe4#
      • 1...Rd6+
        • 2.exd6#
      • 1...Rc7+
        • 2.Kxc7#
      • 1...Sxc5+
        • 2.Ke8#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Sd6
        • 2.exd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • R(g);N_GUARD,P_SPINS(h)::S(F)
    • R(g);CHECK,OGATE,P_SPINS(h)::R(C)+P(D),XR(g)
    • R(g);CHECK,N_GUARD,P_SPINS(h)::S(F),XR(g)
    • B(a);N_GUARD::QAB(A)
    • B(a);N_GUARD::QAB(A),XB(a)
    • B(b);N_GUARD::QAR1(A)
    • S(h);CHECK,OGATE,P_SPINR(g),P_SPINS(h),XP(D)::R1(C),XS(h)
    • S(h);P_SPINR(g),XR(K)::S(F)
    • P(f);N_GUARD::S(F)
  • Tries
    • Try
      • K(H);CHECK,S_FLIGHT
      • Vars
        • R(g);N_GUARD,P_SPINR(g),P_SPINS(h)::R1(K),XR(g)
        • S(h);CHECK,N_GUARD,P_SPINR(g),P_SPINS(h)::R1(K),XS(h)
        • S(h);P_SPINR(g),XR(K)::S(F)
      • Refutation
        • K(e);S_FLIGHT,XS(F)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(g);CHECK,OGATE,P_SPINS(h)::R(C)+P(D),XR(g)
        • R(g);CHECK,N_GUARD,P_SPINS(h)::S(F),XR(g)
        • S(h);CHECK,OGATE,P_SPINR(g),P_SPINS(h),XP(D)::R1(C),XS(h)
        • B(a);N_GUARD::QAB(A),XB(a)
      • Refutation
        • B(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAB(A),XB(a)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • R(g);CHECK,OGATE,P_SPINS(h)::QAR(A)+P(E),XR(g)
      • R(g);CHECK,P_SPINS(h)::R(K)+K(H),XR(g)
      • S(h);CHECK,N_GUARD,P_SPINR(g),P_SPINS(h),XP(D)::R(K)+K(H)
      • B(a);N_GUARD::QAB(A),XB(a)
      • S(h);OGATE,P_SPINR(g)::QAR(A)+P(E),XS(h)
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