MESON Chess Problem Database

Problem Display
PID: 8 (3Bn3/1B3p2/1n3R1p/R1r1k3/3N4/qN3P1K/1pP1Pr1b/1b2Q3 w - - 0 1)

Heidrich, Gerhard

1st Prize, Austrian Workers' Chess Federation, 1930

3Bn3/1B3p2/1n3R1p/R1r1k3/3N4/qN3P1K/1pP1Pr1b/1b2Q3

#2

11 + 11

5862 An ABC of Chess Problems 1970

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Qxe2#
    • 1...Rxf3+
      • 2.Sxf3#
      • 2.exf3#
    • 1...Rd5
      • 2.Sc6#
    • 1...Sxf6
      • 2.Bc7#
  • Tries
    • 1.Rxc5+?
      • 1...Sd5
        • 2.Sc6#
        • 2.Rxd5#
      • 1...Qxc5!
    • 1.Re6+?
      • 1...Kf4
        • 2.Re4#
        • 2.Qd2#
        • 2.e3#
      • 1...fxe6!
    • 1.Qd2?
      • threat
        • 2.Sc6#
        • 2.Qe3#
      • 1...Rxf3+
        • 2.Sxf3#
      • 1...Qxb3
        • 2.Sc6#
      • 1...Qxa5
        • 2.Qe3#
      • 1...Rxe2
        • 2.Sc6#
        • 2.Qxe2#
      • 1...Bxc2
        • 2.Sc6#
      • 1...Sxf6
        • 2.Bc7#
      • 1...Qa4
        • 2.Qe3#
      • 1...Bf4
        • 2.Sc6#
        • 2.Qxf4#
      • 1...Sc4
        • 2.Sc6#
      • 1...Sd6
        • 2.Sc6#
      • 1...Sd5!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qe3#
      • 1...Rxf3+
        • 2.Sxf3#
      • 1...Qxb3
        • 2.Sxb3#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...Bxc2
        • 2.Sxc2#
      • 1...Sxf6
        • 2.Bc7#
      • 1...Bf4
        • 2.Sf5#
      • 1...Sc4
        • 2.Sb5#
      • 1...Sd5
        • 2.Sc6#
      • 1...Sd6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(c);N_SPINR(f),OGATE,P_SPINR(c),XP(C)::QAR(A),XR(c)
    • R(f);::S(G)
    • S(k);N_GUARD,SBLOCK,XR(I)::B(K)
  • Tries
    • Try
      • R(H);CHECK,XR(f)
      • Refutation
        • Q(e);XR(H)
    • Try
      • R(I);CHECK
      • Refutation
        • P(j);XR(I)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);CHECK,XP(E)::S(G),XR(c)
        • Q(e);P_PINP(E),XS(D)::S(G)
        • Q(e);N_SPINR(f),XR(H)::QAR2(A)
        • B(a);XP(B)::S(G)
        • S(k);N_GUARD,SBLOCK,XR(I)::B(K)
        • Q(e);::QAR2(A)
        • S(h);::S(G)
        • S(k);::S(G)
      • Refutation
        • S(h);N_SPINR(f)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • R(c);CHECK,XP(E)::QAB(A)+S(G),DCHECK,XR(c)
      • Q(e);XS(D)::QAB(A)+S(G),XQ(e)
      • R(c);XP(C)::QAB(A)+S(G),XR(c)
      • B(a);XP(B)::QAB(A)+S(G),XB(a)
      • S(k);N_GUARD,SBLOCK,XR(I)::B(K)
      • B(d);SBLOCK::QAB(A)+S(G)
      • S(h);::QAB(A)+S(G)
      • S(h);N_SPINR(f),SBLOCK::QAB(A)+S(G),DCHECK
      • S(k);SBLOCK::QAB(A)+S(G)
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