MESON Chess Problem Database

Problem Display
PID: 237305 (b2K1B2/Q7/1P2R3/1PPp1p2/2Pk1P2/1B1p1P2/p2P2r1/8 w - - 0 1)

Rice, John Michael

Rochade Europa, 2010

b2K1B2/Q7/1P2R3/1PPp1p2/2Pk1P2/1B1p1P2/p2P2r1/8

#2

12 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Qg7#
    • 1...Rf2
      • 2.Qg7#
    • 1...Rh2
      • 2.Qg7#
    • 1...Rg7
      • 2.Qxg7#
    • 1...a1Q
      • 2.Qxa1#
    • 1...a1S
      • 2.Qxa1#
    • 1...a1B
      • 2.Qxa1#
    • 1...a1R
      • 2.Qxa1#
  • Tries
    • 1.Bg7+?
      • 1...Kxc5
        • 2.Qa3#
        • 2.Qe7#
      • 1...Rxg7!
    • 1.Qa3?
      • threat
        • 2.Qb2#
      • 1...Rxd2
        • 2.Bg7#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...dxc4!
    • 1.Qa4?
      • threat
        • 2.cxd5#
      • 1...dxc4
        • 2.Qxc4#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...Rxd2!
    • 1.cxd5?
      • threat
        • 2.Qa4#
      • 1...Rxd2
        • 2.Qg7#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...Bxd5!
    • 1.c6?
      • threat
        • 2.b7#
      • 1...Rxd2
        • 2.Qg7#
      • 1...dxc4
        • 2.Qd7#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...Bb7!
  • Keys
    • 1.b7!
      • threat
        • 2.c6#
      • 1...Rxd2
        • 2.Bg7#
      • 1...dxc4
        • 2.Rd6#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD,XP(A)::QAB(J)
    • R(b);N_GUARD::QAB(J)
    • R(b);N_GUARD::QAB(J),XR(b)
    • P(a);OGATE::QAB(J),XQ(a)
    • P(a);OGATE::QAB(J),XS(a)
    • P(a);OGATE::QAB(J),XB(a)
    • P(a);OGATE::QAB(J),XR(a)
  • Tries
    • Try
      • B(L);CHECK
      • Refutation
        • R(b);XB(L)
    • Try
      • Q(J);
      • Threat
        • QAB(J)
      • Vars
        • R(b);N_GUARD,XP(A)::B(L)
        • P(a);OGATE::QAB(J),XQ(a)
        • P(a);OGATE::QAB(J),XB(a)
      • Refutation
        • P(e);XP(D)
    • Try
      • Q(J);
      • Threat
        • QAR(J)+P(D),XP(e)
      • Vars
        • P(e);OGATE,P_SPINP(e),XP(D)::QAR1(J),XP(e)
        • P(a);OGATE::QAB(J),XQ(a)
        • P(a);OGATE::QAB(J),XR(a)
      • Refutation
        • R(b);XP(A)
    • Try
      • P(D);XP(e)
      • Threat
        • QAR(J)
      • Vars
        • R(b);N_GUARD,XP(A)::QAB(J)
        • P(a);OGATE::QAB(J),XQ(a)
        • P(a);OGATE::QAB(J),XR(a)
      • Refutation
        • B(g);XP(D)
    • Try
      • P(G);
      • Threat
        • QAB(J)+P(H)
      • Vars
        • R(b);N_GUARD,XP(A)::QAB(J)
        • P(e);OGATEB,XP(D)::QAR(J)
        • P(a);OGATE::QAB(J),XQ(a)
        • P(a);OGATE::QAB(J),XR(a)
      • Refutation
        • B(g);
  • Actual
    • P(H);
    • Threat
      • QAB(J)+P(G)
    • Vars
      • R(b);N_GUARD,XP(A)::B(L)
      • P(e);OGATEB,XP(D)::R(I)
      • P(a);OGATE::QAB(J),XQ(a)
      • P(a);OGATE::QAB(J),XR(a)
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