MESON Chess Problem Database

Problem Display
PID: 233807 (rn5Q/4p3/pB2prN1/4p3/4k1B1/1N4P1/2P5/3R1bK1 w - - 0 1)

Zipf, Volker

Freie Presse, 1977

rn5Q/4p3/pB2prN1/4p3/4k1B1/1N4P1/2P5/3R1bK1

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Qxe5#
    • 1...Rf3
      • 2.Qxe5#
    • 1...Rf4
      • 2.Qxe5#
    • 1...Rf7
      • 2.Qxe5#
    • 1...Rf8
      • 2.Qxe5#
    • 1...Sd7
      • 2.Qxa8#
  • Tries
    • 1.Bf3+?
      • 1...Kf5
        • 2.Qh5#
      • 1...Rxf3
        • 2.Qxe5#
      • 1...Kxf3!
    • 1.Bf2?
      • threat
        • 2.Sc5#
      • 1...Rxf2
        • 2.Qxe5#
      • 1...Sd7
        • 2.Qxa8#
      • 1...Bd3!
    • 1.Rd3?
      • threat
        • 2.Sd2#
        • 2.Sc5#
      • 1...Rf2
        • 2.Sc5#
        • 2.Qxe5#
      • 1...Sd7
        • 2.Sd2#
        • 2.Qxa8#
      • 1...Bxd3!
    • 1.Rd4+?
      • 1...Ke3
        • 2.Ra4#
        • 2.Rb4#
        • 2.Rc4#
        • 2.Rf4#
      • 1...exd4!
    • 1.Rd6?
      • threat
        • 2.Sd2#
      • 1...Rf2
        • 2.Qxe5#
      • 1...exd6!
    • 1.Rd8?
      • threat
        • 2.Sd2#
      • 1...Rf2
        • 2.Qxe5#
      • 1...Sd7!
    • 1.Qxf6?
      • threat
        • 2.Bf3#
        • 2.Qxe5#
        • 2.Qf3#
      • 1...Be2
        • 2.Qxe5#
      • 1...Bg2
        • 2.Qxe5#
      • 1...Sc6
        • 2.Bf3#
        • 2.Qf3#
      • 1...Sd7
        • 2.Bf3#
        • 2.Qf3#
      • 1...exf6!
    • 1.Qh1+?
      • 1...Rf3
        • 2.Qxf3#
      • 1...Bg2!
    • 1.Qxb8?
      • threat
        • 2.Qxe5#
        • 2.Qb7#
        • 2.Qxa8#
      • 1...Rxg6
        • 2.Qb7#
        • 2.Qxa8#
      • 1...Rf5
        • 2.Qb7#
        • 2.Qxa8#
      • 1...Rf8
        • 2.Qxe5#
        • 2.Qb7#
      • 1...Ra7
        • 2.Qxe5#
      • 1...Bc4
        • 2.Qxe5#
      • 1...Bb5
        • 2.Qxe5#
      • 1...Rxb8!
    • 1.Qd8?
      • threat
        • 2.Sd2#
      • 1...Sd7
        • 2.Qxa8#
      • 1...Rf2!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Sd2#
      • 1...Sxd7
        • 2.Qxa8#
      • 1...Rf2
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(f);OGATE::QAR1(I),XP(c)
    • S(i);OGATE::QAB(I),XR(h)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(I)
        • R(f);OGATE,SBLOCK,XB(F)::QAR1(I),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XB(F)
    • Try
      • B(G);
      • Threat
        • S(D)
      • Vars
        • R(f);OGATE,XB(G)::QAR1(I),XP(c)
        • S(i);OGATE::QAB(I),XR(h)
      • Refutation
        • B(a);
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);XR(A)
    • Try
      • R(A);CHECK
      • Refutation
        • P(c);XR(A)
    • Try
      • R(A);
      • Threat
        • S(D)
      • Vars
        • R(f);OGATE::QAR1(I),XP(c)
      • Refutation
        • P(g);XR(A)
    • Try
      • R(A);
      • Threat
        • S(D)
      • Vars
        • R(f);OGATE::QAR1(I),XP(c)
      • Refutation
        • S(i);
    • Try
      • Q(I);XR(f)
      • Threat
        • DUALS(3)
      • Vars
        • B(a);::QAR1(I),XP(c)
      • Refutation
        • P(g);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(I),XR(f)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(I);XS(i)
      • Threat
        • DUALS(3)
      • Vars
        • R(h);::QAR1(I),XP(c)
        • B(a);::QAR1(I),XP(c)
      • Refutation
        • R(h);XQ(I)
    • Try
      • Q(I);
      • Threat
        • S(D)
      • Vars
        • S(i);OGATE::QAB(I),XR(h)
      • Refutation
        • R(f);
  • Actual
    • R(A);
    • Threat
      • S(D)
    • Vars
      • S(i);OGATE,XR(A)::QAB(I),XR(h)
      • R(f);OGATE::QAR1(I),XP(c)
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